Geogrid Patent Valid but not Infringed

Tensar Technologies Ltd v. Enviro-Pro Geosynthetics Ltd 2019 FC 277 Manson J
            2,491,858 / multiaxial geogrids

Geogrids are a heavy duty plastic mesh used for applications such as holding rocks and fill in place in civil engineering projects. The 858 patent relates to multiaxial geogrids, which have a hexagonal rather than rectangular mesh pattern. In this decision Manson J held that Tensar’s 858 patent relating to was valid but not infringed. The decision turned entirely on the facts.

Geogrids were an improvement over the prior art, which primarily consisted of woven or knitted geosynthetics, like a heavy duty landscape fabric. The first generation geogrids had a primarily rectangular form. The multiaxial form had a number of advantages, such as strength in more directions [47], and defendant, Enviro-Pro, lost market share to Tensar soon after Tensar introduced its multiaxial product [61]. Enviro-Pro then reached out to its Chinese supplier of geogrids, TMP, to see if it could make a competing product [62]. In order to avoid infringing Tensar’s patent, Enviro-Pro instructed TMP to make the product according to the prior art Wyckoff patent [63]. Before launch, Enviro-Pro even asked an independent consultant to check a sample of the TMP product to make sure it was manufactured entirely in accordance with the Wyckoff patent. The consultant had been provided with the Wyckoff patent, but not with a sample of Enviro-Pro’s product, and it seems that he did not appreciate the significance of some of the fine points (or even some of the basic points) of the patent [64]. This seems like an instance of failing to consider “where the shoe pinches”.

Because it had taken these steps, Enviro-Pro tried to run a Gillette defence, on the basis that it had manufactured its product in accordance with the prior art. Unfortunately, while TMP may have been instructed to follow the Wyckoff patent, the evidence did not establish it had actually done so [139]. There were significant differences between the teaching of the Wyckoff patent and the material made by TMP and sold by Enviro-Pro [137]. Accordingly, the Gillette defence failed [140].

On claim construction there was one contentious term, “continuous orientation.” Manson J did not entirely accept the evidence of either expert in coming to his conclusion [100]-[120]. This simply illustrates the well-established rule that claim construction is a matter for the Court [70].

On obviousness, Manson J found that the prior art patents all had a significant difference from the teachings of the 858 patent [150]. Manson J took into account the need to avoid hindsight, as well as the actual course of conduct – which had required considerable experimentation by an experienced engineer who brought a novel perspective to bear, having previously designed military armour – and concluded that the differences would not have been obvious to a posita [162].

While the patentee prevailed on validity, Manson J held that Tensar had failed to establish infringement [173-74]. This was not a case in which non-infringement was established. Rather, Manson J had concluded that the element of continuous orientation required a predominant or substantial degree of uninterrupted molecular orientation in a specified area of the grid, and the testing methods used by the patentee where simply incapable of establishing the degree or direction of orientation [171]. There being no evidence to establish infringement, the defendant prevailed on the burden of proof [172]. The defendant also tendered evidence of non-infringement, but that evidence was also deficient [184], [188]. While Manson J considered that the defendant’s evidence offered “some limited additional support” for the conclusion of non-infringement [188], the case was decided primarily on the basis of lack of evidence of infringement.

Routine Correction of Inventorship

General Transport Equipment Pty Ltd v Canada (Attorney General) 2019 FC 309 McDonald J
            2,639,371

In the third decision released this week that raises no interesting issues of law, McDonald J granted a routine uncontested application, pursuant to s 52, to amend the records to add a co-inventor to the 371 patent.

Controlled Release Dosage Form Patent Not Invalid on the Facts

Valeant Canada LP/Valeant Canada SEC v Generic Partners Canada Inc 2019 FC 253
Fothergill J
            2,412,671 / NOC

Valeant v Generic Partners is the second case released this week, and the second to raise no interesting issues of law. Valeant’s 671 patent relates to a controlled release dosage form for drugs requiring gastric retention. One known mechanism for controlled release was a polymeric matrix which swells in the stomach so the dose cannot exit into the small intestine [2]. It turns out that some of these forms, particularly those with an elongated shape for easy swallowing, could nonetheless partially exit if the pill became lodged with the long dimension protruding into the pylorus (the opening to the small intestine) [3]. The 671 patent comprises a swellable dosage form with a particular shape that avoids this problem.

In this NOC proceeding, Generic Partners conceded infringement of several claims, and attacked the validity of the 671 patent on the basis of anticipation, obviousness, double patenting and insufficiency. The main attacks were anticipation and obviousness. These both failed on the facts, essentially because nothing in the prior art suggested that shape was a central component of gastric retention [71]-[72], [106]-[108]. Rejection of the double patenting attack followed directly from the conclusion on anticipation [111], and Fothergill J easily dismissed the insufficiency allegation [116].

ATV Track Assemblies Patents Invalid on the Facts

Camso Inc v Soucy International Inc 2019 FC 255 Locke J

2,372,949 / 2,388,294 / 2,822,562 / 2,825,509 / ATV Track Assemblies

Camso’s patents at issue in this case concerned ATV track assemblies. In a decision which turned on claim construction and the facts, Locke J held all the claims in issue (almost 250 different claims in three patents) to be invalid for anticipation and/or obviousness [442]. 

The aim of the invention was to provide an ATV track assembly that would be easy to steer especially on hard ground. This was accomplished by reducing the size of the track belt’s contact area with the ground, both longitudinally (along the length of the track) and transversely (across its width) [5]. A smaller contact patch makes it easier to pivot the track. The contact patch was reduced longitudinally by arranging the assembly so that the bottom run of the track belt is slightly curved from front to back, “so that it rises from the ground ahead of and behind the area of ground contact which bears the weight of the assembly and the ATV” [6]. It was reduced transversely by using rodless tracks which omitted the usual transverse stiffening rods [8].

Soucy had focused its defence on non-infringement, and consequently had argued for a narrow scope of claims, conceding the validity of many claims. The patentee, Camso, had argued for broader claim construction, in order to establish infringement: [330-32]. Camso largely prevailed on claim construction, but its victory was Pyrrhic, as the result was that the broad claims were invalid. The rodless track patents were anticipated by an early kit sold by another track assembly maker. The kit had not been particularly successful – it was not clearly established that any had actually been sold [318] – but it had been publicly displayed and promoted, and any skilled person would have readily recognized that the tracks were rodless [319]. The curved track assembly patents were anticipated by one of the earliest track assemblies ever commercially sold [357-59]. In effect, the inventors had rediscovered features that had been used in some very early track assemblies and then abandoned. Some of the many claims had additional features that were not anticipated, but these variants were obvious over the same prior art, or some additional prior art.

What Does Actavis v Lilly Mean for Canadian Law?

I have a new article forthcoming in the Intellectual Property Journal, entitled “Protection Extending Beyond the Language of the Claim: What Does Actavis v Lilly Mean for Canadian Law?” The article will be published in two parts. Here is the abstract for Part I:

In its landmark decision in Actavis UK Ltd v Eli Lilly and Co, the UK Supreme Court held that the scope of protection afforded by a patent claim will sometimes “extend beyond” the meaning of the words of the claim, even when those words are read contextually. The Court also provided a structured approach to determining when extended protection is appropriate. This article considers what Actavis means for Canadian law. Part I argues that the Actavis approach represents a refinement of existing Canadian law, not a revolution. In the leading Supreme Court of Canada companion cases on claim construction, Free World Trust v Électro Santé Inc and Whirlpool Co v Camco Inc, the Court held that claim construction in Canadian law was, and always had been, based on purposive construction, including an identification of the essential elements of the claim. The extended protection of Actavis stems from the same recognition that omission of non-essential elements does not avoid infringement. Part II will argue that the Actavis approach is also sound as a matter of policy.

Cotter, Hovenkamp, and Siebrasse on Patent Holdup

Tom Cotter, Erik Hovenkamp, and I have posted a paper on ssrn titled Demystifying Patent Holdup, 76 Washington & Lee Law Review __ (forthcoming 2019). Here is a link to the paper, and here is the abstract:

Patent holdup can arise when circumstances enable a patent owner to extract a larger royalty ex post than it could have obtained in an arm's length transaction ex ante. While the concept of patent holdup is familiar to scholars and practitioners—particularly in the context of standard-essential patent (SEP) disputes—the economic details are frequently misunderstood. For example, the popular assumption that switching costs (those required to switch from the infringing technology to an alternative) necessarily contribute to holdup is false in general, and will tend to overstate the potential for extracting excessive royalties. On the other hand, some commentaries mistakenly presume that large fixed costs are an essential ingredient of patent holdup, which understates the scope of the problem. 

In this article, we clarify and distinguish the most basic economic factors that contribute to patent holdup. This casts light on various points of confusion arising in many commentaries on the subject. Path dependence—which can act to inflate the value of a technology simply because it was adopted first—is a useful concept for understanding the problem. In particular, patent holdup can be viewed as opportunistic exploitation of path dependence effects serving to inflate the value of a patented technology (relative to the alternatives) after it is adopted. This clarifies that factors contributing to holdup are not static, but rather consist in changes in economic circumstances over time. By breaking down the problem into its most basic parts, our analysis provides a useful blueprint for applying patent holdup theory in complex cases.

Is the Test for Correcting Inventorship Errors under S 52 the Same as under S 31?

Pharma Inc. v. Canada (Commissioner of Patents) 2019 FC 208 Pentney J
            2,503,570

This decision concerned an uncontested application to add the name of a co-inventor who had been inadvertently omitted from the original application [1], [2]. The leading case on this issue is Micromass UK Ltd v Canada (Commissioner of Patents), 2006 FC 117 [10], which held that an application to the Court is required, as the Commissioner cannot make corrections related to inventorship under s 8 of the Act, which only gives the Commissioner authority to correct “clerical errors” [4]. Pentney J granted the application pursuant to s 52, which provides that:

52 The Federal Court has jurisdiction, on the application of the Commissioner or of any person interested, to order that any entry in the records of the Patent Office relating to the title to a patent be varied or expunged.

While the matter was routine, one point caught my eye. Pentney J remarked that:

[5] In prior cases involving the addition or deletion of an inventor’s (or co-inventor’s) name, the Court has considered the test set out in sub-sections 31(3) and (4) of the Act, which relate to the addition or removal of applicants to a pending patent application: Plasti-Fab v Canada (Commissioner of Patents), 2010 FC 172, at para 14; Qualcomm Inc v Canada (Commissioner of Patents), 2016 FC 1092; Gilead Sciences Inc. v Canada (Commissioner of Patents), 2019 FC 70. The pertinent part for the purposes of this application requires that the Court be satisfied: (i) that the person should be joined as a co-inventor; and (ii) “that the omission of the further applicant or applicants had been by inadvertence or mistake and was not for the purpose of delay” (sub-section 31(4)).

Note the careful language. Pentney J did not say that the test for changing inventorship under s 52 is the same as under s 31(3)(4), but rather that the Court “has considered” that test. Nonetheless, on the facts he applied the s 31 test, and there seems to be a creeping tendency to import the s 31 test into s 52.

While the point didn't make any difference on the facts, it seems to me that it would be wrong in principle to hold that the s 31(4) test applies under s 52 as well. (And I would repeat that Pentney J did not so hold.) Section 31(4), relevant to adding an inventor, provides as follows:

(4) Where an application is filed by one or more applicants and it subsequently appears that one or more further applicants should have been joined, the further applicant or applicants may be joined on satisfying the Commissioner that he or they should be so joined, and that the omission of the further applicant or applicants had been by inadvertence or mistake and was not for the purpose of delay.

The second part of the test stated by Pentney J in [5], that “that the omission of the further applicant or applicants had been by inadvertence or mistake and was not for the purpose of delay,” is drawn directly from s 31(4), as Pentney J noted. Section 52 is much broader on its face. As Layden-Stevenson J noted in Micromass:

[15] The powers conferred on the Court under section 52 are very broad. In Clopay, Cameron J. described section 54 (now section 52) of the Act in the following manner:

...I think, therefore, that s. 54 was enacted so as to enable the rectification by the Court of the records in the Patent Office relating to title in order that the party or parties actually entitled to the grant or to be registered as to the assignees of the patent, might have their rights properly recorded (p. 235).

There is no suggestion in Micromass, or in s 52 itself, that s 52 is in any way restricted to cases of inadvertence or mistake.

The notion that the test from s 31 is relevant to s 52 appears to stem from Plasti-Fab 2010 FC 172 [14], where O’Keefe J, after quoting at length from Micromass, stated “Therefore this Court may, in place of the Commissioner, engage the test set out in subsection 31(4) to determine if an individual should be joined.” With respect, there is nothing whatsoever in the passage quoted by O’Keefe J, or anywhere else in Micromass, to suggest that s 52 engages the test set out in s 31(4).

Other cases have considered the relationship between the provisions. In Gilead 2019 FC 70 [2], Grammond J stated that “This Court has said, however, that the criteria found in section 31(4), which governs the addition of applicants to a patent application, are relevant to an application under section 52,” citing Micromass and Pasti-Fab. Plasti-Fab does stand for this proposition, via the questionable interpretation of Micromass, just discussed, but Micromass does not.

Qualcomm #1 2016 FC 499 (blogged here) concerned an application under s 52 to remove a co-inventor from a granted patent. Simpson J considered s 31(3), which relates to the removal of an named inventor from an application, where (i) “it . . . appears that one or more of them has had no part in the invention,” and (ii) the Commissioner is satisfied “by affidavit that the remaining applicant or applicants is or are the sole inventor or inventors.” Simpson J stated at [7] that “I am satisfied that the first part of the test in [s 31(3)] is relevant” under s 52; but this is only to say that a named inventor should not be removed unless they are in fact not an inventor. No doubt the Court would have come to that conclusion under s 52, even without consulting s 31(3). She then went on to say that the second part of s 31(3), the requirement for an affidavit, did not apply [8]-[11]. Thus, Qualcomm #1 is authority for the proposition that the test from s 31(3) is not applicable under s 52, though some of the same considerations may be relevant.

In Qualcomm #2 2016 FC 1092 (blogged here) Southcott J noted that Simpson J in Qualcomm #1 had held that affidavits were not required under s 2, but he accepted them nonetheless given that they had been sworn and introduced into evidence. He did not suggest that he disagreed with Simpson J’s holding.

It does seem entirely reasonable to say that the test from s 31 may be relevant under s 52, in that whenever the more restrictive requirements of s 31 are met, it will almost always be appropriate to order the correction under s 52. But on the face of the Act, and in light of Micromass and Qualcomm #1, it seems to me that the opposite is not true; s 52 might properly be invoked even in circumstances where the test from s 31 is not satisfied.

This is a longer post than is perhaps necessary given that the issue discussed made no difference on the facts. But I am concerned that by slow accretion of obiter statements it might become accepted that the s 31 test is required under s 52, thereby effectively reading a restriction from s 31 into s 52. I appreciate Pentney J’s careful language on this point, noting that prior decisions had considered the test from s 31, without saying that it was necessary under s 52.

Airbus v Bell Punitive Damages Award Upheld

Airbus Helicopters S.A.S. v. Bell Helicopter Textron Canada Limited 2019 FCA 29 de Montigny JA: Pelletier, Boivin JJA aff’g 2017 FC 170 Martineau J
            2,207,787 / helicopter landing gear

In Eurocopter v. Bell Helicopter Textron Canada Limitée 2012 FC 113 aff’d 2013 FCA 219 Martineau J held that one of the claims of the 787 patent, owned by Eurocopter (now the helicopter division of Airbus), to be valid and infringed. The patent covers sleigh type skid landing gear for helicopters [8]. In the subsequent Airbus Damages decision, Martineau J awarded $500,000 in compensatory damages (see here and here) and $1,000,000 in punitive damages, plus pre-judgment and post-judgment interest. (I wrote far to much on the punitive damages aspect of the trial decision, trying to analyze the relevant principles. I won’t repeat that here, but for those who are interested the posts are here, here, and here.) Airbus appealed, arguing that the award of punitive damages should have been higher, alleging a variety of errors [29]. Bell cross-appealed on the basis that the award of punitive damages was too high [71]. A few general principles arise from the FCA decision.

The standard of review is deferential

The Court noted that:

[30] It is now well established that appellate intervention with respect to an award of punitive damages will only be warranted where the trial court made an error of law or a “wholly erroneous assessment” of the quantum of damages (Richard v. Time Inc., 2012 SCC 8, [2012] 1 S.C.R. 265 at para. 190 (Time)). In Cinar Corporation v. Robinson, 2013 SCC 73, [2013] 3 S.C.R. 1168 (Cinar), the Supreme Court summarized the applicable standard of review in the following way:

In [Time], this Court held that an appellate court may only interfere with a trial judge’s assessment of punitive damages (1) if there is an error of law; or (2) if the amount is not rationally connected to the purposes for which the damages are awarded, namely prevention, deterrence (both specific and general), and denunciation …

                                    Cinar at para. 134.

Airbus argued that Martineau J had not attached sufficient importance to various factors, such as the blameworthiness of the respondent’s conduct, and the financial means of the defendant [39]. However, Martineau J “correctly identified the factors going to the proportionality of a permissible quantum of punitive damages, and properly applied them to the facts of this case” [50]. So long as that is done, the FCA will not be inclined to reweigh the relevant factors itself [39], [45]-[52], [57].

Prior awards may be used as guideposts

Airbus argued that “the judge’s determination of the quantum of punitive damages was based on his erroneous belief in the existence of a $2,000,000 ceiling” on punitive damages awards [34]. The FCA concluded that Martineau J had not in fact felt himself limited by any such ceiling [36], [38]. Rather, “he saw this scale simply as a helpful indication of the range of punitive damages previously awarded” [36]. Moreover (emphasis added):

[37] In my view, there is nothing untoward or inappropriate in using a range of previous awards, as guideposts, in assessing the quantum of punitive damages. Even the Supreme Court, in Whiten, took such a range into account, when it concluded that the award was “certainly at the upper end of a sustainable award on these facts but not beyond it” (at para. 4). It is, in fact, a very common practice, and a sound one for that matter, to consider previous awards in assessing the quantum of punitive damages in a particular case.

Lubrizol is of limited precedential value

In Lubrizol 58 CPR(3d) 167 (FCTD) rev’d 67 CPR(3d) 1 (FCA) the FC had initially awarded $15,000,000 in punitive damages. This was overturned on appeal because the quantum of the compensatory damages had not been considered in the analysis [40] and they had not yet even been assessed. As the FCA stated in Lubrizol, “the Court cannot decide whether exemplary damages are required until after it decides whether the general damages were insufficient for punishment and deterrent purposes.” Airbus argued that nonetheless the FCA in Lubrizol had “implicitly agreed” that $15,000,000 was appropriate [41]. The FCA in this case rejected that reading of Lubrizol [41], and went on to state that

[43] Lubrizol was decided almost 25 years ago and does not seem to have been given much precedential value. I have been unable to find any other case where such a large award of punitive damages has been made, and counsel has not drawn our attention to any such case. [On review of other awards] Lubrizol would therefore appear to be the outlier in terms of the significance of the award in punitive damages, and the judge was certainly entitled to distinguish that decision from the present case.

Post infringement mitigating conduct should be considered

Bell had originally used the infringing gear, known as the “Legacy” gear, but after an infringement action was brought in Canada and other jurisdictions (including the US and France), had switched to non-infringing Production gear [10]. Martineau J had taken this into account as a mitigating factor in assessing punitive damages. Airbus argued that doing so was an error of law. It argued, based on the discussion of “potential harm” in Whiten 2002 SCC 18 [117], that “the seriousness of the prejudice must be assessed at the time of the wrongful behaviour, whether or not actual prejudice ensued” [60]. This FCA rejected this, pointing out that it was clear from the SCC discussion in Whiten that “what the Court really wanted to prevent was for bare luck to be considered as a mitigating factor” [61].

Further, the FCA held that “it was open to the judge to regard the steps taken by the respondent after the infringement as a mitigating factor” [62], and indeed,“[n]ot taking into account the conduct of the respondent after being notified of the violation would be antithetical to [the holistic and balancing approach endorsed in Whiten]” [63, my emphasis]: and see [64].

Sanctions for the same infringement in other jurisdictions may be taken into account

Airbus argued that Martineau J had erred in law in considering other penalties, in particular the likelihood of damages for infringement in parallel US and French proceedings [65],[66]. (And see [FC 435], [FC 440]. The FCA held that this may be taken into account, at least so long as the proceedings related to the same infringement [66] and are actually likely to result in a sanction [67]. (Though in any event, on the facts Martineau J appears to have considered this factor to be neutral [69].)

Finally, Bell cross-appealed on the basis that the award of $1,000,000 was more than the minimum necessary to meet the purposes of punitive damages [71]. The FCA rejected this argument, holding that on the facts, it was open to Martineau J to conclude that substantial punitive damages were warranted [75].

Patent Listing Timing Turns on Date Submission is “Administratively Complete”

Eli Lilly Canada Inc. v. Canada (Attorney General) 2019 FC 5 Lafrenière J
            2,812,704 / pegbovigrastim / IMRESTOR

The PM(NOC) Regulations allow patents to be listed against a drug. The basic rule is that only patents which pre-date the NOC application are eligible for listing, on the rationale that subsequent inventions should not extend the duration of the linkage [12]. The Regulations implement this timing requirement with two provisions. Subsection 4(5) states that the patent list must be submitted at the time of filing the NDS, so that only patents that have already been granted can be listed under this provision. But it is not necessary that the patent has already been granted, so long as it has been applied for. Subsection 4(6) provides that a patent is eligible for listing if it has a Canadian filing date prior to “the date of filing of the [new drug] submission.” The question in this case is what is the date of filing of the NDS: is it the date at which the NDS is “administratively complete” or the date at which is it substantively or technically complete? Short answer: the former.

On June 21, 2011, Elanco submitted a Drug Submission Application form and some related forms, which got the ball rolling on the application process [20]. This material was received on June 24, 2011 and determined to be “administratively complete” as of that date. It was common ground that the submission was not substantively complete, in the sense that the efficacy data, animal safety data, etc required by subsection C.08.002(2) was not provided [20]. Elanco had been permitted to engage in a rolling submission process [19], and the bulk of the substantive information was provided over the year from March 2012 to March 2013. The Canadian patent filing date was September 22, 2011 [22], between these two dates. Thus, if it is enough that the NOC application is administratively complete, then the ‘704 patent was not eligible for listing as the patent filing date was after the NDS filing date. But if the NOC application has to be substantively complete, the timing requirement would be met, and ‘704 would be eligible for listing.

Health Canada’s position is that the date of filing is when the NDS is administratively complete. Accordingly, it refused to list the ‘704 patent. Elanco appealed. Lafrenière J, applying a deferential standard of review [50], upheld Health Canada’s position. (To be eligible for listing under s 4(6), it is also necessary that the patent be submitted for listing within 30 days of issuance. That requirement was met, and was not at issue [31].)

A key point is that “[n]either the Patent Act, the NOC Regulations or the FD Regulations define the term “date of filing” of a submission, nor do they establish rules for determining that date” [58]. Elanco relied on C.08.002(2) of the FD Regulations, which specify “A new drug submission shall contain sufficient information and material to enable the Minister to assess the safety and effectiveness of the new drug, including...” Elanco argued that “shall” was a mandatory provision. However, as Lafrenière J noted, “Subsection C.08.002(2) simply speaks to the contents of a NDS and not to when a NDS may be considered filed. All the provision does is to set out the information that a first person is required to provide in order for a submission to be processed” [59]. If it were mandatory in terms of timing, then the practice of allowing rolling submissions would not be permitted [60].

In the absence of governing statutory provisions defining the date of filing, it was open to the Minister to allocate a filing date for submissions [63]. Moreover, the rationale for using the date the filing is sound, because it promotes certainty [66]. Adopting a requirement of substantive completeness would introduce considerable uncertainty, both in light of rolling submissions and supplementary submissions.

Crystalline Form Not Obvious to Try

Apotex Inc v Pfizer Canada Inc 2019 FCA 16 Boivin JA: Webb, de Montigny JJA aff’g 2017 FC 774 Brown J
Teva Canada Ltd v Pfizer Canada Inc 2019 FCA 15 Boivin JA: Webb, de Montigny JJA aff’g 2017 FC 777 Brown J

2,436,668 / desvenlafaxine (ODV) / PRISTIQ / NOC

In ODV the FCA has affirmed Brown J’s finding that Claims 8 and 9 of the ‘668 patent, to Form I ODV succinate (a particular crystal form of a particular salt of the compound ODV), were not obvious. The decision turns on the obvious-to-try analysis: see here for a review of the facts. The FCA decision does not apply new law, but it is another helpful discussion of the obvious-to-try analysis applied to the particular facts. It is useful to contrast this case, in which the crystalline form was found not to be obvious on an obvious-to-try analysis, with Dasatinib 2017 FCA 190 aff’g 2017 FC 296, holding the claims at issue to be obvious-to-try: see here for a discussion. These are companion cases, and the reasons are largely the same. This discussion will refer primarily to the Apotex decisions, simply because it is the one I happened to read first.

As the FCA discussed in Atazanavir 2017 FCA 76 (see here), as well as in Ciba v SNF 2017 FCA 225 (see here), the role of the inventive concept in an obviousness analysis has been problematic. In this case, it was uncontested that the inventive concept of the relevant claims is Form I ODV succinate. Apotex’s main argument was that “the Federal Court Judge erred when he made reference to the properties of ODV succinate – and specifically Form I – in his reasons as they are not part of the inventive concept” [37]. This is an important point. An obvious to try analysis is likely to be appropriate “where advances are often won by experimentation” (Sanofi [68]). In such a case, the detailed properties of the invention normally cannot be predicted in advance. If the detailed properties are part of the inventive concept, then the claimed invention would never be obvious, even though it was obvious to try and succeeded without the need for inventive ingenuity, as, for example, in Dasatinib. The FCA acknowledged this concern:

[38] I am mindful that our Court cautioned in Atazanavir to not implicitly adopt a definition of the inventive concept that focuses on properties if the properties are not part of the inventive concept (Atazanavir at para. 74).

In the Teva appeal, the Court noted that there was no dispute between the parties that the inventive concept does not include properties [32]. (This is not to say that the properties can never be part of the inventive concept, as the Court indicated in [38].)

Apotex’s complaint did have some basis in Brown J's reasons; in places, he did discuss the properties of ODV in a way that could be taken to imply that it would have been necessary to be able to predict its properties from the prior art: see eg the passages quoted at [38]. However, when read as a whole:

the Federal Court Judge did not find non-obviousness on the basis that the properties were not predictable in the manner seemingly suggested by Apotex. Indeed, although the Federal Court Judge discusses properties in various parts of his reasons, his conclusion that Form I ODV succinate is not obvious does not rest solely on the unpredictability of the properties of a salt form. Rather, the Federal Court Judge relied on evidence that demonstrated that a skilled person could not have known or predicted that the Form I ODV succinate – i.e., the crystal form itself – could be made or even existed:

So, Brown J found that “the number of experiments required to move from the acceptable pharmaceutical salts to the Form I ODV succinate was extremely large, as Dr. Myerson deposes at para 102 of his affidavit, and in the nature of a research program, not routine experimentation” [FC 230] quoted at [38]. Sp, on the facts, actually making the crystal form required inventive ingenuity, quite aside from whether the properties are part of the inventive concept, or could have been predicted.

The FCA also affirmed that the jurisprudence “does not establish any “hard and fast rules” on obviousness when it comes to evaluating whether or not a salt screen or any other form of experimentation is obvious or not” [42]. Whether salt forms, polymorphs or crystalline forms are obvious will turn on the facts of the case.

No new cases

No new substantive patent cases were released for the week of 28 January.

No new cases

No new substantive patent cases were released last week.

Note that I generally only blog on substantive patent cases. To keep abreast of all new decisions, including procedural decisions and copyright and trade-mark cases, I recommend subscribing to the Daily Intellectual Property News service from Alan Macek's IPPractice.

Ownership Can Be Raised as a Defence but Not as a Counterclaim

Farmobile, LLC v Farmers Edge Inc 2018 FC 1269 Mactavish J aff’g 2018 FC 915 Ring J
            2,888,742 / Farming data collection

Farmobile, the patentee in this action, sued Farmers Edge (FE) for infringement of the 742 patent. FE asserted, by way of both defence and counterclaim, that it was the rightful owner of the patent [915-3]. The defence and counterclaim were both based on the same facts [14], [914-38], to the effect that the right in the invention had been assigned to it [8]-[12], [914-4]. Farmobile sought to strike the allegations related to ownership from both the Statement of the Defence and the Statement of Counterclaim, which were considered separately. Ring J granted the motion to strike the counterclaim, but allowed the same allegations to stand as a defence (see here). Mactavish J has now affirmed.

In affirming that the allegation of ownership may stand as a defence, Mactavish J established what appears to be a novel point, albeit a minor one, namely that ownership of the patent by the defendant is indeed a defence to a claim of patent infringement which may be asserted in Federal Court, like non-infringement, invalidity and use pursuant to a licence [31]. This was in the face of Farmobile’s argument that the Federal Court lacked jurisdiction to entertain ownership in any context; it asserted that “while ownership is indeed a defence to a claim for patent infringement, it is not one that can be asserted in this Court” (Mactavish J’s emphasis). As Mactavish J pointed out, it is well-established that a licence to use is a valid defence, notwithstanding that assessing the merits of such a defence involves a matter of contractual interpretation, and “A licence is, after all, merely one form of contract” [32]. This holding seems clearly correct, but it is nonetheless a relief.

At the same time, Mactavish J affirmed that the Court does not have jurisdiction to consider exactly the same issue, based on exactly the same facts, by way of counterclaim. Mactavish J held that the contracts relating to ownership may be used a shield, but not as a sword [26], [35], [50]. The rationale is that in the defence, the essence of the litigation is patent infringement, while in the counterclaim, the essence of the litigation is patent ownership. This distinction does have support in the cases, in particular Innotech (1997) 74 CPR (3d) 275 (FCA), relied on by Mactavish J [34],[43]-[50]. And it is also reasonable to say the that the Federal Court can determine ownership when raised as a defence to an infringement action, even if it does not have jurisdiction to do so when ownership is raised independently.

However, the shield / sword distinction does not address, or affect, the more fundamental issue as to whether the Federal Court has jurisdiction to consider patent ownership when raised indepednently. If the Federal Court does not have such jurisdiction, then the sword / shield distinction makes sense; but if it does have such jurisdiction, then it doesn’t. Mactavish J’s reasoning is sound if one accepts that the Federal Court does not have jurisdiction to determine patent ownership on its own, but nothing in her decision addresses that fundamental point, one way or the other.

In previous posts, here and here, I have argued that the Federal Court does indeed have such jurisdiction, in light of s 20(2) of the Federal Court Act which gives the Federal Court “concurrent jurisdiction in all cases. . . in which a remedy is sought under the authority of an Act of Parliament or at law or in equity respecting any patent of invention.” In Kellogg [1941] SCR 242 the SCC interpreted the predecessor provision of the Exchequer Court Act as follows:

It will be noticed that subsection (c) deals with the "remedy" which is sought. And it enacts that the Exchequer Court shall have jurisdiction between subject and subject in all cases where a "remedy is sought" "respecting any patent of invention" "under the authority of any Act of the Parliament of Canada or at Common Law or in Equity." The remedy sought by the appellant, as a result of paragraph 8 of its statement of claim, is evidently a remedy in Equity respecting a patent of invention. The appellant claims that remedy as a consequence of the facts alleged in its paragraph 8 [that the appellant was owner by assignment]. It claims the remedy as owner deriving its title from the same alleged inventor of whom the respondent claims to be the assignee, through other assignors. In such a case, the invention or the right to the patent for the invention is primarily the subject-matter of the appellant's claim, and the remedy sought for is clearly "respecting any patent of invention." And this is covered by subsection (c) of section 22 of the Exchequer Court Act, as it stands at present.

Mactavish J interpreted Kellogg as holding that the Federal Court “may resolve contractual issues raised in an action that is in ‘pith and substance’ within the Court’s jurisdiction” [20]. I’m not sure that is exactly right: what the above passage says is that a party has jurisdiction when seeking a remedy respecting any patent of invention; which, of course, is what s 20(2) of the Act says on its face.In any event, whatever the broader principle, it seems to be to say quite explicitly that the Court does have jurisdiction in the circumstances at hand.

The argument endorsed above was made in the alternative (though that does not detract from its authority, as it was "obviously intended for guidance" and so should be accepted as authoritative: R v Henry 2005 SCC 76 [57]). Mactavish J implicitly distinguished Kellogg by saying that in that case the “primary issue” was a matter of patent law, not that alternative argument, citing pages 249-250. The exact “matter of patent law” at issue in Kellogg at 249 was as follows

the appellant is entitled to the benefit of the invention because John L. Kellogg, Jr. [the putative inventor], at the time when he is alleged to have made it, was in the employ of the appellant and then carrying out work which he was instructed to do on the plaintiff's behalf, and that, by virtue of his contract of employment and the circumstances under which the invention was made, he became and is a trustee of the invention for the company; if it be true further that, by reason of his being such a trustee, he was unable to transfer any right, title, or interest in the invention to any other party, and that the plaintiff is now the owner of any invention so made by John L. Kellogg, Jr., this would be one of the reasons why the appellant should be declared entitled, as against the respondent, to the issue of a patent including the claims in conflict as applied for by it.

That is, the "matter of patent law" is the question of who is the true owner of the patent in light of the contract of employment. This is exactly the question at issue in Farmobile: see the allegations [915-4], reproduced in my post on Ring J’s decision. The argument which I have previously discussed, based on what is now s 20(2), was an argument in the alternative. The primary basis for the decision in Kellogg, which Mactavish J acknowledged was a matter of patent law, is that ownership of a patent by virtue of contractual assignment and related circumstances, is essentially a matter of patent law and so the Federal Court has jurisdiction by virtue of that fact. This is entirely apart from any authority to award a remedy under s 20(2), or vary the Register under s 20(1). This aspect of Kellogg strikes as even more fundamental and directly on point. I cannot see how it is distinguishable from the facts at hand.

I remain perplexed by the Federal Court’s unwillingness to accept jurisdiction in these situations. When SCC precedent is unsound, I can understand that the Federal Court would resist its application by looking for tenuous distinctions. Indeed, that is in part how the common law “works itself pure.” But to my mind Kellogg makes perfect sense. The Federal Court consistently recognizes that it is “inconvenient” to require a party to commence a second proceeding in a provincial superior court in such circumstances [52]; the Court does not seem to be resisting jurisdiction out of concern that it would create some practical problem, which might not be apparent to an academic such as myself. It is of course true that inconvenience in itself is not a basis to assert jurisdiction where it does not exist [52], but conversely, creating inconvenience is not a basis to refuse jurisdiction where it does exist.

More broadly, a court faced with the question of who is the present owner of the patent must address who was the inventor, in order to determine who had the right to make a valid assignment in the first place, and that is surely a matter of patent law; as well as the question of how is the first owner, which is usually said to be a matter of patent law (see Comstock 38 CPR(3e) 29, 51-54; s 49); as well as the matter of priorities under s 51. Ultimately the remedy is amendment of the Register, which is established pursuant to s 12, and which the Federal Court, but not the provincial superior courts, has the authority to order amended, pursuant to s 52. Thus, patent law and the Patent Act is implicated at every stage of an patent ownership dispute. Consequently, while contacts of assignment are also implicated, the matter of ownership of a patent seems to me to be essentially a matter of patent law, and that is what Kellogg says on its face.

Legal Fees Not a Deductible Expense in an Accounting

Human Care Canada Inc v Evolution Technologies Inc 2018 FC 1302 supplementary reasons 2018 FC 1304 Elliott J
            2,492,392

In Human Care v Evolution Tech, Human Care brought an action against Evolution for infringement of its 392 patent related to “rollators” – a “walker” with wheels, primarily used to assist the elderly with mobility issues. Evolution counterclaimed that the 392 patent was invalid. The case turned on the facts. One legal point of passing interest, the deductibility of legal costs as an expense in an accounting of profits, was raised.

Infringement, as usual, turned on claim construction, and Elliott J generally preferred the evidence of Human Care’s expert. For example, Elliott J agreed with counsel for Human Care that the key expert for Evolution “has looked at the claims, picked at random words, define[d] them outside of the claims, and then reinserted them into the claims” [189]. Validity attacks based on anticipation [382], obviousness [405], [410], and overbreadth [420], likewise failed on the facts.

Turning to damages, the parties agreed that the quantum for reasonable compensation for ‘infringement’ after publication but prior to grant, should be based on royalties actually charged by Human Care during that period, and the number of units was also agreed [41], so there was “nothing to discuss” on this issue [432].

Elliott J held Human Care was entitled to elect an accounting rather than damages, essentially on the basis that there was no reason, such as undue delay, for denying the election [436]. This is consistent with the general practice of presumptively allowing the patentee to elect an accounting unless there is some equitable reason to refuse it. (There are one or two cases where the Court has held that the burden was on the successful patentee to establish an entitlement to an infringement, but these are the exception.)

It appears that Human Care’s rollator design swept the market, so that there was no non-infringing alternative; if Evolution had not sold infringing rollators, it would have had to leave the market, and might well have gone out of business [455]. Elliott J noted that “Where there is no non-infringing alternative, the infringer must turn over all profits made from the infringing act, less legitimate expenses incurred” [462].

One unusual point is that Evolution sought a deduction for legal fees as a business expense. Elliott J noted that:

[477] This Court has been generally hesitant to accept deductions for legal fees. For instance, in Teledyne [(1982), 68 CPR(2d) 204), Mr. Justice Addy at [pages] 214-216 did not allow the defendant to deduct legal expenses because it was concluded that such an approach would allow the infringing party to retain part of its unjust enrichment.

The point was apparently a novel one in Teledyne, as the only cases cited related to deductibility for income tax purposes of legal expenses incurred for the purpose of doing business, and as such, “are not remotely applicable” (215). To say Addy J was "hesitant" to accept such a deduction, is an understatement. He said (my emphasis):

That question must be answered most emphatically in the negative, regardless of the fact that the expenditure might well be considered from a general accounting standpoint as being a variable expense incurred in the course of selling the infringing product. Allowing this deduction would amount to the Court rewarding the wrongdoer and contravening its own finding. Such a decision would, in my mind, be likely to bring the administration of justice into disrepute and, in addition, contribute to the unjust enrichment of the wrongdoer. It is impossible for me to conceive how a court of equity would even seriously consider these expenses as a legitimate deduction and indeed the Defendant was unable to point to any case where the question was even raised.

I admit the concept does seem outrageous, but outrage is always an uncertain basis for a legal holding, and to my mind Addy J’s next point was more persuasive:

Furthermore, the Court in this action awarded-costs to the Plaintiff on a party-and-party basis. A deduction of the Defendant's costs on a solicitor-and-silent basis would in effect constitute a direct contradiction of its previous order. Costs in an action have always been considered separately from the ether claims of the parties to that action, as the considerations governing allowance or disallowance of costs, the amounts granted and the scales on which they are to be calculated are quite different from those which govern the Court's findings on substantive issues. It is for this same reason that a successful plaintiff, who elects to as for an assessment of damages, is not entitled to add his legal expenses in prosecuting the action as part of the damages incurred.

That strikes me as entirely persuasive. Costs awards are dealt with separately, with distinct considerations, related to eg the incentive to litigate, and the need to sanction the conduct of the case, and so on. To allow deduction of the legal fees as an expense on the accounting would undermine the rationale for the costs award.

(Note that Addy J remarked that “[a] similar claim was also disallowed in the Dubiner v. Cheerio Toys case [[1966] Ex.C.R. 801, 837-38]” but I note that in Dubiner the legal costs were disallowed primarily “on the simple ground that the defendant failed to prove these accounts,” and it is therefore not strong authority for refusing the deduction as a matter of principle.)

In the case at hand, Elliott J, after citing Teledyne, nonetheless allowed a deduction for legal costs to a certain extent, as being the amount the defendant “spent prior to the litigation in this and a parallel dispute” [478]. This seems to suggest that the principle enunciated by Addy J is applicable only in respect of litigation expenses incurred after the statement of claim is actually filed. I’m not sure that is a principled distinction, but the issue discussed so briefly that I won't explore it further..

Overall, a number of the expense deductions were disallowed in whole or in part for lack of adequate proof. The result was a “rough justice” award of just over $12 million.

Elliott J also granted a permanent injunction on established view that ““[t]he Court should refuse to grant a permanent injunction where there is a finding of infringement, only in very rare circumstances” [485], quoting Valence v Phostech 2011 FC 174 [240]. Compound interest (“profits-on-profits”) was refused on the basis that Human Care “did not provide thorough submissions on why profits-on-profits is merited in this case” [487]. The supplementary reasons clarified the terms of the injunction and order for delivery up, as well as the details of the damages and interest assessment.

Reasonable Lump Sum Costs

Teva Canada Ltd v Janssen Inc 2018 FC 1175 Locke J
            2,203,936 / 2,435,146 / 2,738,706 / bortezomib / VELCADE

This is the costs decision from 2018 FC 754, in which Locke J granted Teva’s claim for compensation under s 8 of the NOC Regulations, dismissed the counterclaim for infringement, and awarded costs to Teva. The parties disputed whether costs should be awarded as a lump sum, or after an assessment [7]-[8].

Locke J’s general comments on lump sum costs are of interest (original emphasis):

[4] Though I am not convinced that there is support for Teva’s statement that lump sum awards are becoming the norm, I do accept that they have found increasing favour with courts because they save time and further the objective of securing “the just, most expeditious and least expensive determination” of proceedings (per Rule 3): Nova Chemicals Corporation v Dow Chemical Company, 2017 FCA 25 at para 11 [Dow].

[5] A lump sum award of costs is particularly appropriate in complex litigation between sophisticated litigants and in the context of commercial litigation: SNF Inc v Ciba Specialty Chemicals Water Treatments Limited, 2018 FC 245 at para 3 [SNF].* In dealing with lump sum, the efficiency of a set amount requires the Court to use a bit of a “broad sword” approach: SNF at para 9.

[6] Lump sum awards tend to range between 25% and 50% of actual fees, though there may be cases where a higher or lower percentage is warranted: Dow at para 17.

Within that range, he suggested that the higher end “seems to be appropriate mainly for situations in which the Court wishes to express its displeasure with the conduct of the losing party” [35]. With that said:

[38] I disagree with the assertion of the plaintiffs by counterclaim that elevated costs are reserved for exceptional cases where there is reprehensible, scandalous or outrageous conduct. Based on the authorities cited by the plaintiffs by counterclaim, this limitation applies only to awards of solicitor-and-client costs.

On the facts, Locke J held that a lump sum was appropriate in light of the complexity of the litigation [32], and an amount of 25% was appropriate [36]. However, he was concerned that he had no basis for assessing the reasonableness of Teva’s legal fees of $4.8 million, which appeared high even for a case of this complexity [32], [34]. He accordingly based the lump sum, not on the actual fees, but what he considered to be reasonable fees, In the absence of more detail, he accepted no more than $3.4 million as reasonable, and awarded $850,000 (inclusive of tax), that is, 25% of $3.4 million [36] (plus reasonable disbursements). This query as to the reasonableness of the fees was not related to the conduct of the litigation itself, which Locke J noted was efficient, and indeed “praiseworthy” [25].

Because of the uncertainty regarding the details of Teva’s fees, he compared this amount with the amount that might have resulted from a determination under the Tariff [33], and in particular the top of Column V, in light of the unusual complexity of the case [37]. The top end of Column V, based on Teva’s submissions, would have resulted in an award of about $990,000 (plus tax) [40], while the top of Column IV would result in about $780,000 (plus tax) [49]. This confirmed the reasonableness of the lump sum award of$850,000 (inclusive of tax) for fees, which was the amount actually awarded.

It’s interesting that in the end, Teva was awarded about 18% of its actual fees as the prevailing party in complex, well-run litigation — $850,000 (including tax) on actual fees of $4,778,473 (it’s not clear to me whether that includes tax).

There is also an interesting point on legal v technical complexity (original underlining, my italics):

[13] The plaintiffs by counterclaim also assert that it is the complexity of legal issues, not technical issues, which should be considered in determining costs. In support of this position, they cite MK Plastics Corporation v Plasticair Inc, 2007 FC 1029 at para 24, which cites TRW Inc v Walbar of Canada Inc (1992), 43 CPR (3d) 449, [1992] FCJ No. 606 (QL) at pp 456-7 (FCA). These precedents do not explain why the issues to be considered under this heading do not include technical issues, but I accept the effect of this jurisprudence. In any case, the technical complexity of the case is reflected in other factors such as the amount of work and the reasonableness of expert witness expenses.

Locke J's apparent concern regarding the validity of this distinction made no difference on the facts, as he found the legal issues in this case to be particularly complex [14], even for pharmaceutical litigation involving obviousness.

*Unfortunately, the costs decision in SNF v Ciba which was cited by Locke J, does not appear to have been posted on the FC website.

Miscellaneous Issues in Cefaclor Damages

Apotex Inc v Eli Lilly and Co 2018 FCA 217 Gauthier JA: Gleason, Laskin JJA aff’g 2014 FC 1254 Zinn J
            1,133,007 – 1,146,536 – 1,133,468 – 1,150,725 [Lilly Patents]
            1,095,026 – 1,132,547 – 1,136,132 – 1,144,924 [Shionogi Patents]

There are a couple of miscellaneous points arising out of Cefaclor Damages FCA that I’d like to address.

Grain Processing
In her remarks on general principles, Gauthier JA noted that

[48] [I]t is important to understand that our Court did not simply import an American law concept in a wholesale fashion. The Court in Lovastatin may indeed have referred to American authorities in order to better ground the concept. But one must be careful not to construe references to American jurisprudence lending support for the NIA defence as a blind incorporation of, or strict adherence to, the reasoning adopted by American courts.

This is all fair enough in the abstract, but a bit obscure; the FCA seems to be implying that there is some particular aspect of American law which is not good law in Canada, but without specifying exactly what.

I wonder if the remark might have been aimed at Grain Processing 85 F3d 1341 (Fed Cir 1999), in which the Fed Cir allowed the infringer to rely on an NIA which was not in existence at the relevant time. Grain Processing was relied on by Apotex both in Lovastatin FCA and in this case. Gauthier JA pointed out that Grain Processing, can be distinguished on the facts, because in that case the NIA was a process that increased the cost by only 2.3%, while in this case the increased costs were raised by at least 40%. I agree; and there is another related distinction. In Grain Processing, the only reason the infringer did not develop the infringing process earlier was that it did not know it was infringing. The infringer knew of the patent, and was trying to design around it, and thought it had succeeded, but there was a technical dispute over exactly how the “dextrose equivalent value” specified by the claim was to be measured (using the “Schoorl test” or the “Lane-Eynon test”). The infringer guessed wrong. But the point remains that once the true construction of the claim had been determined, the infringer had no difficulty designing around the claim and developing a substantially equivalent non-infringing process. That is why the Fed Cir in Grain Processing ultimately held that the infringer would have used the non-infringing process from the outset; it was very clear on the facts that it could have developed the NIA much earlier and would have done so had it known that the process it was using was infringing. This is very far from facts in this case, in which it was difficult to design around the patent and the resulting process was not economically competitive [44e, n]. Again, I’m not sure that Gauthier JA’s general remark was actually aimed at Grain Processing, and I do agree with Gauthier JA that we cannot assume that US law on this issue is correct in every respect. But Grain Processing itself is entirely sound, given its unusual facts, and because of those unusual facts it provides a particularly striking example of the NIA defence; but it is only equally unusual facts that will generate the same kind of result.

Convoyed Sales and Remoteness
On a different issue, Apotex also argued that it is an error of law “to award damages for sales displaced by non-infringing products because such sales are beyond the scope of the Patent Act [and] are too remote” [112]. Gauthier JA re-affirmed that the well-established law that damages for lost sales of so-called convoyed goods are indeed recoverable [114], [122], and on the facts the sales at issue were not too remote [127]. But Gauthier JA did appear to acknowledge that in some circumstances convoyed sales might be too remote for damages to be recoverable, even though the lost sales were caused by infringement [123]-24]. That is, causation is not necessarily the only limitation on recovery in patent damages. Gauthier JA did warn that remoteness is not usually an issue, and it should be raised as soon as possible or it may be considered to have been waived [123].

Compound Interest May Be Awarded as Damages, but Must Be Proven, Not Presumed

Apotex Inc v Eli Lilly and Co 2018 FCA 217 Gauthier JA: Gleason, Laskin JJA aff’g 2014 FC 1254 Zinn J
            1,133,007 – 1,146,536 – 1,133,468 – 1,150,725 [Lilly Patents]
            1,095,026 – 1,132,547 – 1,136,132 – 1,144,924 [Shionogi Patents]

As previous posts this week have discussed, the FCA’s reasoning differed somewhat from that of Zinn J, but in the end it varied his decision only in respect of the award of compound interest, which it returned to him for redetermination. The FCA confirmed that compound interest is available when interest is claimed as a head of damages; but the loss cannot be presumed, and must be proven [156], [158].

Gauthier JA’s discussion started with a brief and helpful discussion of the law relating to compound interest, confirming that while compound prejudgment interest is not available when interest is claimed under s 36 of the FC Act (per 36(4)(b)), it may be awarded when interest is claimed as a head of damages [145]-[152]. (Gauthier JA largely summarized the principles she had stated in Cefaclor Liability FC 2009 FC 991 [665]-[675], but it is helpful to have these principles restated by the FCA itself.)

Gauthier JA also stated that “The Liability Decision was not reversed on appeal and is final. In light of this, in my view, it was not open to Apotex to argue that subsection 55(1) of the Patent Act does not allow for the granting of compound interest” [151]. This seems to be saying that it is not open to Apotex to make that argument because that issue was res judicata in this dispute. However, given Gauthier JA’s preceding discussion of the law, it would now seem to be clearly established more generally that 55(1) does allow compound interest to be awarded.

Procedurally, subsection 36(5) confers discretion on the FC to allow interest, and in a bifurcated proceeding such as this one, that discretion must be exercised at the liability stage (unless the parties agree otherwise) [149]. However, at the liability stage, the court cannot know whether an entitlement to interest will be established as a head of damages at the reference stage, so the award of simple interest under s 36 at the liability stage was in this case (and, presumably, normally should be) expressly conditional on interest not being awarded as damages at the reference phase [150].

The problem with Zinn J’s decision is not that he awarded compound interest, but rather that he awarded it on the basis of a presumption: “in today’s world there is a presumption that a plaintiff would have generated compound interest” [FC 118], [155] (FCA emphasis), and he awarded compound interest apparently on this basis. Gauthier JA held that there is no such presumption [156] (with the possible exception of some cases in equity [157]), and “a loss of interest must be proved in the same way as any other form of loss or damage” [158]. As to what kind of evidence could be used to establish compound interest as a loss, and the appropriate rate, Gauthier JA noted that various evidence was tendered on the issue, and had the Federal Court granted compound interest as damages on the basis of that evidence, rather than on the basis of a presumption, the FCA would not have intervened unless it was persuaded that the assessment was tainted by a palpable and overriding error [153].