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Case: 14-1294 Document: 205 Page: 1 Filed: 04/18/2016 NO. 2014-1294 IN THE UNITED STATES COURT OF APPEALS FOR THE FEDERAL CIRCUIT PURDUE PHARMA L.P., THE P.F. LABORATORIES, INC., PURDUE PHARMACEUTICALS L.P., AND RHODES TECHNOLOGIES, - vs - EPIC PHARMA, LLC, Plaintiff-Appellants, Defendant-Appellee. Appeal from the United States District Court for the Southern District of New York in No. 1:13-cv-00683-SHS, Judge Sidney H. Stein (Caption continued on inside cover.) BRIEF OF AMICI CURIAE DONALD E. KNEBEL AND MARK D. JANIS IN SUPPORT OF PETITION FOR REHEARING EN BANC OF PURDUE PHARMA L.P., ET AL. Mark D. Janis* Center for Intellectual Property Research Indiana Univ. Maurer School of Law 211 S. Indiana Avenue 211 S. Indiana Avenue Bloomington, IN 47401-7001 Bloomington, IN 47401-7001 Donald E. Knebel Center for Intellectual Property Research Indiana Univ. Maurer School of Law (812) 855-1205 (317) 231-7214 mdjanis@indiana.edu dknebel@btlaw.com *Attorney for Amici Curiae, Mark D. Janis and Donald E. Knebel In Support of Appellant Purdue Pharma, L.P.

Case: 14-1294 Document: 205 Page: 2 Filed: 04/18/2016 2014-1296 PURDUE PHARMA L.P., THE P.F. LABORATORIES, INC., PURDUE PHARMACEUTICALS L.P., AND RHODES TECHNOLOGIES, - v - Plaintiff-Appellants, MYLAN PHARMACEUTICALS INC. AND MYLAN INC., Defendant-Appellees. Appeal from the United States District Court for the Southern District of New York in No. 1:12-cv-02959-SHS, Judge Sidney H. Stein 2014-1306, -1307 PURDUE PHARMA L.P., THE P.F. LABORATORIES, INC., PURDUE PHARMACEUTICALS L.P., AND RHODES TECHNOLOGIES, AND GR NENTHAL GMBH - v - Plaintiff-Appellants, AMNEAL PHARMACEUTICALS, LLC Defendant-Appellee. Appeal from the United States District Court for the Southern District of New York in No. 1:11-cv-08153-SHS, Judge Sidney H. Stein (Caption continued.)

Case: 14-1294 Document: 205 Page: 3 Filed: 04/18/2016 2014-1311, -1312, -1313, -1314 GR NENTHAL GMBH, PURDUE PHARMA L.P., THE P.F. LABORATORIES, INC., PURDUE PHARMACEUTICALS L.P., AND RHODES TECHNOLOGIES, - v - Plaintiff-Appellants, TEVA PHARMACEUTICALS USA, INC. Defendant-Appellee. Appeals from the United States District Court for the Southern District of New York in No. 1:11-cv-02037-SHS and 1:12-cv-05083-SHS, Judge Sidney H. Stein

Case: 14-1294 Document: 205 Page: 4 Filed: 04/18/2016 CERTIFICATE OF INTEREST Counsel for the Amici Curiae certify the following: 1. The full name of every party or amicus curiae represented by me is: Donald E. Knebel and Mark D. Janis. 2. The name of the real party in interest (if the party named in the caption is not the real party in interest) represented by me is: same as above. 3. All parent corporations and any publicly held companies that own 10 percent or more of the stock of the party or amicus curiae represented by me are: none. 4. The names of all law firms and the partners or associates that appeared for the party or amicus curiae now represented by me in the trial court or agency or are expected to appear in this court are: Donald E. Knebel Center for Intellectual Property Research Indiana University Maurer School of Law 211 S. Indiana Avenue Bloomington, IN 47405-7001 Mark D. Janis Center for Intellectual Property Research Indiana University Maurer School of Law 211 S. Indiana Avenue Bloomington, IN 47401-7001 i

Case: 14-1294 Document: 205 Page: 5 Filed: 04/18/2016 TABLE OF CONTENTS Page INTEREST OF AMICI...1 ARGUMENT...2 I. The Panel s Rule for Determining Validity of Product-by-Process Claims Rests on a Misconception About Relevant Supreme Court Precedent...4 II. The Panel s Rule Incorrectly Presumes That the Rules for Administrative and Judicial Determinations of Validity of Product-by- Process Claims Must be the Same, Contrary to a Prior Panel Decision....5 III. IV. The Panel s Rule Disregards the Patent Law Axiom That Courts are to Construe Claims the Same Way for Both Validity and Infringement...7 The Panel s Rule Threatens to Render Product-by-Process Claims Valueless, Contrary to this Court s Express Pronouncement En Banc in Abbott...8 V. The Panel s Approach to the Product-by-Process Claims at Issue Materially Affected the Obviousness Analysis....10 VI. Conclusion...10 ii

Case: 14-1294 Document: 205 Page: 6 Filed: 04/18/2016 TABLE OF AUTHORITIES CASES Abbott Laboratories v. Sandoz, Inc., 566 F.3d 1282 (Fed. Cir. 2009)... 2, 3, 4, 5, 6, 8, 10 Amgen Inc. v. F. Hoffmann-La Roche Ltd., 580 F.3d 1340 (Fed. Cir. 2009)...2, 4, 6, 7, 8 Atlantic Thermoplastics Co., Inc. v. Faytex Corp., 970 F.2d 834 (Fed. Cir. 1992)...6, 7 In re Brown, 459 F.2d 531 (C.C.P.A. 1972)...6 In re Butler, 37 F.2d 623 (C.C.P.A. 1930)...9 Cochrane v. Basiche Anilin & Soda Fabrik, 111 U.S. 293 (1884)...4, 5 Eibel Process Co. v. Minnesota & Ontario Paper Co., 261 U.S. 45 (1923)...10 General Electric Co. v. Wabash Appliance Corp., 304 U.S. 364 (1938)...4, 5 Greenliant Systems v. Xicor LLC, 692 F.3d 1261 (Fed. Cir. 2012)...2 In re Hughes, 496 F.2d 1216 (C.C.P.A. 1974)...9 Peters v. Active Manufacturing Co., 129 U.S. 530 (1889)...8 In re Thorpe, 777 F.2d 695 (Fed. Cir.1985)...5, 6 ADDITIONAL AUTHORITIES 5A CHISUM ON PATENTS 18.01 (2007)...8 iii

Case: 14-1294 Document: 205 Page: 7 Filed: 04/18/2016 INTEREST OF AMICI Amici curiae are professors at the Center for Intellectual Property Research of the Indiana University Maurer School of Law. Neither the individual amici, the Center, nor Indiana University has any interest in the outcome of this case. However, the Center, as part of its mission, has a strong interest in the sound development and administration of patent law. As a result, the Center and these amici have previously filed amicus briefs in this Court and in the United States Supreme Court on matters of patent law. No one other than the undersigned wrote or funded any portion of this brief. Pursuant to Rule 35(g), amici have filed herewith a Motion for Leave to file this brief. All parties in this case have consented to the filing of this brief.

Case: 14-1294 Document: 205 Page: 8 Filed: 04/18/2016 ARGUMENT This case presents the Court with an opportunity to decide whether judges should take into account process limitations when assessing the validity of product-by-process claims in litigation. The Court has already ruled that when construing claims as a predicate to an infringement determination, courts must treat product-by-process claims as being limited by the recited process terms. Abbott Laboratories v. Sandoz, Inc., 566 F.3d 1282, 1291 (Fed. Cir. 2009) (en banc). However, Abbott did not present a corresponding validity issue, and the Court therefore did not address the logical consequence of its infringement ruling namely, that the proper interpretation of product-by-process claims for validity determinations likewise requires courts to limit the claims to products made by the recited processes. The panel opinion in this case ruled to the contrary. Specifically, the panel declined to apply the Abbott rule to an obviousness determination, holding that it had been proper for the trial court to disregard the process limitation in the product-by-process claims at issue en route to invalidating them for obviousness. Slip Op. at 15-16. The panel relied primarily on a prior panel decision of this Court, Amgen Inc. v. F. Hoffman-La Roche Ltd., 580 F.3d 1340, 1370 (Fed. Cir. 2009), in which the panel refused to apply the Abbott rule to an anticipation analysis. Accord Greenliant Systems v. 2

Case: 14-1294 Document: 205 Page: 9 Filed: 04/18/2016 Xicor LLC, 692 F.3d 1261, 1268 (Fed. Cir. 2012) (commenting on Amgen in the course of deciding an issue of recapture estoppel in a reissue matter). Thus, the panel opinion is the latest in a line of cases that has limited Abbott to the infringement context. The panel s ruling here has implications beyond the present dispute, making it appropriate for en banc review. Moreover, the fact that the general issue has now arisen in several cases suggests that the issue has percolated long enough at the panel level that it is ripe for en banc review. The panel s rule for determining the validity of product-by-process claims warrants en banc reconsideration because it: (1) rests on a misconception about relevant Supreme Court precedent; (2) assumes without analysis that justifications that apply in the context of PTO administrative determinations of patentability necessarily must apply in judicial determinations of validity; (3) disregards the fundamental patent law axiom that courts are to construe claims the same way for both validity and infringement; and (4) threatens to render product-by-process claims valueless, contrary to this Court s express pronouncement en banc in Abbott. Moreover, the panel s rule that process terms can be disregarded in analyzing the validity of product-by-process claims materially affected its obviousness analysis in this case. 3

Case: 14-1294 Document: 205 Page: 10 Filed: 04/18/2016 I. The Panel s Rule for Determining Validity of Product-by-Process Claims Rests on a Misconception About Relevant Supreme Court Precedent. To justify its decision refusing to apply the Abbott rule to interpret a product-by-process claim in the context of anticipation, the panel in Amgen invoked the longstanding proposition that one should not be able to claim exclusive rights in an old product simply by making it by some new process. See, e.g., Amgen, 580 F.3d at 1366 ( It has long been the case that an old product is not patentable even if it is made by a new process. ), citing Cochrane v. Basiche Anilin & Soda Fabrik, 111 U.S. 293, 311 (1884) (hereinafter BASF ); Gen. Elec. Co. v. Wabash Appliance Corp., 304 U.S. 364, 373 (1938) ( [A] patentee who does not distinguish his product from what is old except by reference, express or constructive, to the process by which he produced it, cannot secure a monopoly on the product by whatever means produced. ). The present panel opinion s reliance on Amgen was flawed. The proposition from BASF and General Electric does not answer the claim construction question at issue here, but merely assumes it away. In the present case, as in Amgen, the court must determine whether in fact the claim should be construed to include the process limitation, or as a claim to the product by whatever means produced. If the claim is limited by the process terms, as this Court held in Abbott, the premise for the 4

Case: 14-1294 Document: 205 Page: 11 Filed: 04/18/2016 BASF/General Electric proposition disappears; there is no effort to claim an old product by whatever means produced, and thus no need to trigger the BASF/General Electric proposition. In fact, General Electric noted that a claim could avoid a prior art product if the claim uses language explicitly referring to the method of preparation, or describing the product in phrases suggestive of that process. 304 U.S. 374. That conclusion is inconsistent with Amgen, which holds that process limitations can be ignored in determining anticipation. When it is evident that a line of Federal Circuit panel opinions is built on a misconception about relevant Supreme Court precedent, this Court should sit en banc to reexamine those opinions. The present case affords this Court an opportunity to do so. II. The Panel s Rule Incorrectly Presumes That the Rules for Administrative and Judicial Determinations of Validity of Product-by-Process Claims Must be the Same, Contrary to a Prior Panel Decision. In arriving at its conclusion that it was free to disregard the process limitations in the claims at issue despite Abbott, the panel relied in part on a prior Federal Circuit panel opinion involving an appeal from an ex parte patentability determination. In re Thorpe, 777 F.2d 695 (Fed. Cir. 1985). In that case, this Court ruled that [i]f the product in a product-by-process claim is the same as or obvious from a product of the prior art, the claim is 5

Case: 14-1294 Document: 205 Page: 12 Filed: 04/18/2016 unpatentable even though the prior product was made by a different process. Id. at 697. But cf. MANUAL OF PATENT EXAMINING PROCEDURE 2113 (9th ed. Nov. 2015) (stating that even in ex parte examination, process limitations in a product-by-process claim should not always be disregarded.) The Amgen panel opinion likewise invoked Thorpe. Amgen, 580 F.3d at 1366. Neither the present panel opinion nor the Amgen panel opinion explained why Thorpe should control judicial determinations of validity, especially after Abbott, although the Amgen panel opinion did make a remark in a footnote appearing to equate judicial determinations of validity with ex parte administrative determinations. Amgen, 580 F.3d at 1370 n.14. However, this Court has already extensively explained why Thorpe should not control judicial determinations of validity or infringement in Atlantic Thermoplastics Co., Inc. v. Faytex Corp., 970 F.2d 834 (Fed. Cir. 1992). The Atlantic Thermoplastics panel recited arguments from prior cases suggesting that the PTO might have difficulty examining a product-byprocess claim since the PTO had no capacity to carry out the process steps. Id. at 844 (citing In re Brown, 459 F.2d 531, 535 (C.C.P.A. 1972)). As the Atlantic Thermoplastics court recognized, these rationales are peculiar to the context of ex parte examination. They do not carry over to judicial determinations of validity or infringement, as the Atlantic Thermoplastics panel explicitly pointed out: 6

Case: 14-1294 Document: 205 Page: 13 Filed: 04/18/2016 Thus, accommodating the demands of the administrative process and recognizing the capabilities of trial courts, the court treats claims differently for patentability as opposed to validity and infringement. The PTO s treatment of product-by-process claims as a product claim for patentability is consistent with policies giving claims their broadest possible interpretation. The same rule, however, does not apply in validity and infringement litigation. Id. (emphasis added). Amgen, and the present panel opinion, are in direct conflict with Atlantic Thermoplastics on this point. This Court should intervene en banc to resolve the inconsistencies in its opinions. III. The Panel s Rule Disregards the Patent Law Axiom That Courts are to Construe Claims the Same Way for Both Validity and Infringement. The effect of the panel s ruling as to the treatment of product-byprocess claims is to reject the principle that claims should be construed the same way for infringement as for validity, and the principle that a product that literally infringes if later, anticipates if earlier. In Amgen, the panel acknowledged that its approach to product-by-process claims contravened these principles, Amgen, 580 F.3d at 1369-70 (acknowledging that [t]he impact of these different analyses is significant ), but offered no justification for the difference. Respectfully, these principles should not be set aside so lightly. The principle that claim language must be interpreted the same way for determinations of validity and infringement is not simply a rule of convenience. It is, instead, a fundamental tenet of patent law." 5A 7

Case: 14-1294 Document: 205 Page: 14 Filed: 04/18/2016 CHISUM ON PATENTS 18.01 (2007 ). It also informs the famous symmetry principle: That which [literally] infringes, if later, would anticipate, if earlier. Peters v. Active Manufacturing Co., 129 U.S. 530, 53 (1889). This Court should intervene en banc to reconsider whether setting aside these deeply-embedded principles is justified in the present context. IV. The Panel s Rule Threatens to Render Product-by-Process Claims Valueless, Contrary to this Court s Express Pronouncement En Banc in Abbott. The patent statute mandates that patents include claims particularly pointing out and distinctly claiming the patented subject matter, but it does not prescribe particular claiming formats. 35 U.S.C. 112 (b). This approach relieves Congress and the courts from the duty of micromanaging the formats of which claims, and leaves to the creativity of the patent drafter and the pressures of the marketplace the primary task of developing the best approaches to rendering inventions in words. Courts should be wary of adopting rules that single out particular claiming formats for condemnation. Consistent with this approach, in Abbott, this Court stated that its en banc decision in no way abridges an inventor's right to stake claims in product-by-process terms. Abbott, 566 F.3d at 1293. But the present panel decision, like that in Amgen, does just what Abbott sought to avoid: undercutting the viability of product-by-process claims so severely as to virtually eliminate any benefit to employing them. If the process limitations 8

Case: 14-1294 Document: 205 Page: 15 Filed: 04/18/2016 in a product-by-process claim must be met for infringement, but can be ignored for validity determinations, there is little to be gained in pursuing such claims. An inventor would be better off simply omitting the process limitations and taking its chances on the product limitations being sufficiently novel to avoid invalidity. But it is precisely to avoid such situations that the Court of Custom and Patent Appeals decided to endorse the use of product-by-process claims beyond the traditional setting of necessity in In re Hughes, 496 F.2d 1216, 1219 (C.C.P.A. 1974) (Rich, J.) (speaking of product-by-process claims as a hedge against the possibility that [the applicant s] broader product claims might be invalidated. ). Product-by-process claims also might be valuable in facilitating the pursuit of a direct infringement cause of action rather than relegating patentees to pursue inducement or contributory infringement actions. Even though the patent holder would still need to prove that the process limitations are satisfied in proving infringement, it may be able to avoid the need to prove the intent element of induced and contributory infringement. Cf. In re Butler, 37 F.2d 623, 625 (C.C.P.A. 1930) (product-by-process claims can avoid difficulties in proving infringement of process claims). Neither the present panel decision nor the decisions on which it relies articulate any basis for rendering product-by-process claims essentially 9

Case: 14-1294 Document: 205 Page: 16 Filed: 04/18/2016 valueless, regardless of the technology area or commercial setting. The Court should sit en banc to reconsider this outcome. V. The Panel s Approach to the Product-by-Process Claims at Issue Materially Affected the Obviousness Analysis. The panel s decision to disregard the process limitation in the claims at issue was material to its obviousness analysis. In particular, because the panel treated the claims as being directed to the end product an oxycodone API with low ABUK levels, Slip. Op. at 13, the panel concluded that the obviousness rule from Eibel Process does not apply. Id., citing Eibel Process Co. v. Minnesota & Ontario Paper Co., 261 U.S. 45 (1923) (holding that where an inventor discovers a non-obvious source of a problem and then applies a remedy in response, the invention is nonobvious and worthy of a patent even if the remedy, standing alone, would generally appear to be known in the art. ) If the process limitations are properly taken into account, the applicability of Eibel Process must be reconsidered. VI. Conclusion. These amici believe that the panel decision in this case and the panel decisions on which it relies are inconsistent with this Court s en banc decision in Abbott Laboratories v. Sandoz, Inc., 566 F.3d 1282 (Fed. Cir. 2009) and threaten the legitimate use of product-by-process claims. They therefore support the Petitioners request for rehearing, en banc. 10

Case: 14-1294 Document: 205 Page: 17 Filed: 04/18/2016 Respectfully submitted, /s/mark D. Janis Donald E. Knebel Mark D. Janis Center for Intellectual Property Research Indiana Univ. Maurer School of Law 211 S. Indiana Avenue Bloomington, IN 47401-7001 11

Case: 14-1294 Document: 205 Page: 18 Filed: 04/18/2016 CERTIFICATE OF SERVICE I hereby certify that on April 15, 2016, a copy of the Brief of Amici Curiae Donald E. Knebel and Mark D. Janis in Support of Petition for Rehearing En Banc of Purdue Pharma, L.P., et al. was filed via operation of the Court s CM/ECF system. Copies of the Brief were served on counsel of record via electronic means on this day, April 15, 2016. /s/mark D. Janis Mark D. Janis 12

Case: 14-1294 Document: 205 Page: 19 Filed: 04/18/2016 CERTIFICATE OF COMPLIANCE 1. This brief complies with the type-volume limitation of Federal Rule of Appellate Procedure 32(a)(7)(B). The brief contains 2054 words, excluding the parts of the brief exempted by Federal Rule of Appellate Procedure 32(a)(7)(B)(iii). 2. This brief complies with the typeface requirements of Federal Rule of Appellate Procedure 32(a)(5) and the type style requirements of Federal Rule of Appellate Procedure 32(a)(6). The brief has been prepared in a proportionally spaced typeface using Microsoft Word 2010 and Times New Roman font set at 14pt font size. Dated: April 15, 2016 /s/mark D. Janis Mark D. Janis 13