Amgen Inc. v. Amneal Pharmaceuticals

District Court, D. Delaware·Decided October 5, 2021·No. 1:16-cv-00853·Unknown

Opinion

IN THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF DELAWARE

: AMGEN INC., : : Plaintiff, : : Civ. No. 16-853-MSG v. : CONSOLIDATED : AMNEAL PHARMACEUTICALS LLC, et al., : Defendant. : :

MEMORANDUM OPINION

Jack B. Blumenfeld, Derek J. Fahnestock, and Anthony D. Raucci, MORRIS, NICHOLS, ARSHT & TUNNELL LLP, Wilmington, Del.; John D. Murnane, Joshua I. Rothman, and Alicia A. Russo, VENABLE LLP, New York, NY. Counsel for Plaintiff Amgen Inc.

John C. Phillips, Jr. and David A. Bilson, PHILLIPS McLAUGHLIN & HALL, P.A., Wilmington, Del., Aaron F. Barkoff, Alejandro Menchaca, and Ben J. Mahon, McANDREWS, HELD & MALLOY, LTD., Chicago, Ill. Counsel for Defendant Piramal Healthcare UK Ltd.

John C. Phillips, Jr. and David A. Bilson, PHILLIPS McLAUGHLIN & HALL, P.A., Wilmington, Del., Holly D. Kozlowski and Christopher J. Dutton, PORTER WRIGHT MORRIS & ARTHUR LLP, Cincinnati, Ohio. Counsel for Intervenor Slate Run Pharmaceuticals LLC.

October 5, 2021 Wilmington, Delaware GOLDBERG, U.S. DISTRICT JUDGE: This Opinion should be the last step in this long running patent litigation arising under the Drug Price Competition and Patent Term Restoration Act of 1984, 21 U.S.C. § 355, also known as the Hatch-Waxman Act. In 2018, after a four-day bench trial, I issued an opinion finding that

Defendant Piramal Healthcare UK Ltd. (“Piramal”) did not infringe United States Patent No. 9,375,405 (the “’405 patent”), which had been assigned to Plaintiff Amgen Inc. (“Amgen”). Thereafter, Amgen posted a $39,000,000 bond to secure an agreed-upon injunction of Piramal and Intervenor Slate Run Pharmaceuticals, LLC (“Slate Run”) pending Amgen’s appeal of my non- infringement judgment. Because the Federal Circuit has affirmed that judgment, Piramal and Slate Run now seek to recover damages from the bond for being wrongfully enjoined. Between March 24 and 25, 2021, I held a two-day bench trial on the issue of damages. After careful consideration of the evidence submitted during that proceeding, I will award $28,701,172 in lost damages plus pre-judgment interest to Piramal and Slate Run. This Opinion sets forth the basis for this award. I. BACKGROUND

A. The Parties Amgen is the assignee of the ’405 patent and markets cinacalcet tablets covered by that patent under the brand-name Sensipar. (D.I. 375 at 2-3). In 2017, Piramal filed Abbreviated New Drug Application No. 210207 with the FDA, seeking approval to market a generic version of cinacalcet tablets in 30, 60, and 90 mg dosage strengths. (D.I. 293-1, Ex. 1 at ¶¶ 80-82). The relationship between Piramal and Slate Run is primarily governed by a 2017 commercialization agreement, wherein Piramal agreed to develop, manufacture, and obtain regulatory approval of its cinacalcet tablets. (PSR-078; D.I. 554 at 1). And, Slate Run was given the exclusive right to sell and distribute Piramal’s tablets in the United States. (Id.). Piramal and Slate Run share the profits from those sales. (Id.). B. Procedural History and Market Entries In 2016 and 2017, Amgen sued several generic cinacalcet manufacturers for infringement of the ’405 patent, including Piramal, Teva, and Cipla.1 These cases were consolidated under the

caption Amgen, Inc. v. Amneal Pharmaceuticals LLC, C.A. No. 16-853. A four-day bench trial was held in March 2018. Cipla settled with Amgen on the eve of trial. (D.I. 320). In July 2018, I issued an opinion concluding that neither Piramal nor Teva infringed Amgen’s ’405 patent and entered judgment accordingly. (D.I. 375; D.I. 376; D.I. 386). Amgen timely filed an appeal to the United States Court of Appeals for the Federal Circuit. (D.I. 397). On December 28, 2018, while the appeal was still pending, Teva launched, becoming the first manufacturer on the market to sell generic cinacalcet. In the pharmaceutical supply chain, manufacturers can sell their drug products to wholesale distributors who can then resell those drug products to hospitals, pharmacies, and clinics (hereinafter, “retailers”). Or, the manufacturer can

skip over the wholesale distributors and sell directly to the retailers. During Teva’s launch, it sold generic cinacalcet to both wholesalers and retailers. (D.I. 668 at 26, 39; PSR066; PTX726 at 3; D.I. 667 at 335:1-3; PSR066). Teva ended its launch on January 2, 2019 by settling with Amgen. (PSR093 § 7.1). The settlement required Teva to stop selling its generic cinacalcet into the market. But that settlement did not prevent wholesalers from reselling their supply of Teva product acquired during the short launch. (D.I. 667 at 267:1-6, 315:7-13). Thus, retailers who wanted Teva product after January

1 The name “Teva” covers Teva Pharmaceuticals USA, Inc., Watson Laboratories, Inc., and Actavis Pharma, Inc. collectively. The name “Cipla” covers Cipla USA, Inc. and Cipla Ltd. collectively. 2, 2019 could still obtain it indirectly from the wholesalers. In addition, the price for the sale between a wholesaler and a retailer can be set one of two ways: (1) by a negotiation between the wholesaler and the retailer, or (2) by a contract between the manufacturer and the retailer. On March 6, 2019, both Cipla and Piramal launched their generic cinacalcet tablets. (D.I.

667 at 265:2-9). At this time, Cipla’s launch was subject to the terms of its private settlement agreement with Amgen, and Piramal’s launch was at-risk because Amgen’s appeal was still pending in the Federal Circuit. (D.I. 418 at 2). Shortly thereafter, Amgen filed separate preliminary injunction motions against Cipla and Piramal to stop their sale of generic cinacalcet tablets. Amgen’s motion against Cipla was subject to full briefing and oral argument before the Honorable Leonard P. Stark. See Cipla Ltd. v. Teva Pharms. USA, Inc., No. 1:19-cv-44-LPS (D. Del.) (D.I. 121). On May 2, 2019, Judge Stark denied Amgen’s preliminary injunction motion against Cipla. (Id. at D.I. 186). Although Piramal and Slate Run initially opposed Amgen’s preliminary injunction motion,

it was not subject to full briefing and oral argument. (D.I. 447). Instead, on April 12, 2019, the parties reached an agreement and filed a proposed order stipulating to an injunction, which I entered on April 15, 2019. (D.I. 457; D.I. 462). The order expressly enjoined both Piramal and Slate Run from selling cinacalcet and further required, pursuant to Fed. R. Civ. P. 62(d), that Amgen post a $39,000,000 bond as a condition of the injunction, which Amgen did on May 22, 2019.2 (D.I. 462; D.I. 476; D.I. 476-1).

2 On October 14, 2020, I granted Slate Run’s motion to intervene as a matter of right under Rule 24(a)(2), after Amgen tried to deny Slate Run access to discovery on the erroneous grounds that Slate Run had not been enjoined and, therefore, could not recover damages under the security bond. (D.I. 554; D.I. 555). On January 7, 2020, the Federal Circuit affirmed my judgment of non-infringement in favor of Piramal and against Amgen. See Amgen Inc. v. Amneal Pharmaceuticals LLC, C.A. No. 19- 1086 (Fed. Cir. Jan. 7, 2020) (D.I. 26). The Federal Circuit issued a mandate to that effect on April 22, 2020. (D.I. 491). The effect of this affirmance was that Piramal and Slate Run were

wrongfully enjoined from April 15, 2019 (when I entered the stipulated injunction order) until April 22, 2020 (when the Federal Circuit issued the mandate). C. The Damages Trial Between March 24 and 25, 2021, I held a bench trial on the issue of damages for wrongful injunction. Testimony was presented by Piramal’s Vice President of Finance Christopher Leahy, Slate Run’s President Michael Plessinger, and two experts. Piramal and Slate Run offered as an expert Ivan T.

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