Indivior Inc. v. Dr. Reddy's Laboratories, S.A.

Court of Appeals for the Federal Circuit·Decided November 20, 2018·No. 18-2167·Unpublished

Opinion

NOTE: This disposition is nonprecedential.

United States Court of Appeals for the Federal Circuit

INDIVIOR INC., INDIVIOR UK LTD., AQUESTIVE THERAPEUTICS, INC.,

Plaintiffs-Appellees

v.

DR. REDDY'S LABORATORIES, S.A., DR. REDDY'S LABORATORIES, INC.,

Defendants-Appellants

2018-2167, 2018-2169

Appeals from the United States District Court for the District of New Jersey in Nos. 2:17-cv-07111-KM-CLW, 2:18-cv-01775-KM-CLW, 2:18-cv-05288-KM-CLW, Judge Kevin McNulty.

Decided: November 20, 2018

JEFFREY B. ELIKAN, Covington & Burling LLP, Washington , DC, argued for all plaintiffs-appellees. Plaintiffs- appellees Indivior Inc., Indivior UK Limited also represented by ERICA NICOLE ANDERSEN, BETH S. BRINKMANN, MATTHEW AARON KUDZIN, JEFFREY HOWARD LERNER; JAMES M. BOLLINGER, MAGNUS ESSUNGER, KATHERINE HARIHAR, TIMOTHY P. HEATON, DANIEL LADOW, GERALD 2 INDIVIOR INC. v. DR. REDDY’S LABORATORIES., S.A.

EAMES PORTER, SUJATHA VATHYAM, Troutman Sanders LLP, New York, NY; CHARANJIT BRAHMA, San Francisco, CA; WILLIAM CHARLES BATON, CHARLES M. LIZZA, Saul Ewing Arnstein & Lehr LLP, Newark, NJ.

JAMES FRANCIS HIBEY, Steptoe & Johnson, LLP, Washington, DC, for plaintiff-appellee Aquestive Therapeutics , Inc. Also represented by JAMIE LUCIA, San Francisco , CA; WILLIAM CHARLES BATON, CHARLES M. LIZZA, Saul Ewing Arnstein & Lehr LLP, Newark, NJ.

KEVIN PAUL MARTIN, Goodwin Procter LLP, Boston, MA, argued for defendants-appellants. Also represented by ELAINE BLAIS, EDWINA CLARKE, ROBERT FREDERICKSON, III, ALEXANDRA LU; ROBERT V. CERWINSKI, IRA J. LEVY, ALEXANDRA D. VALENTI, New York, NY.

Before NEWMAN, LOURIE, and STOLL, Circuit Judges. Opinion for the court filed by Circuit Judge STOLL. Dissenting Opinion filed by Circuit Judge NEWMAN STOLL, Circuit Judge.

Dr. Reddy’s Laboratories S.A. and Dr. Reddy’s Laboratories , Inc. (collectively, “DRL”) appeal from the district court’s order granting Indivior Inc., Indivior UK Ltd., and Aquestive Therapeutics Inc.’s (collectively, “Indivior”) preliminary injunction in this patent infringement case. Because the district court’s conclusion that Indivior was likely to succeed on the merits was based on an erroneous interpretation of claim scope, we vacate the preliminary injunction.

BACKGROUND

Indivior developed and now markets Suboxone Film, a leading treatment for opioid dependency. Suboxone Film contains two active ingredients: buprenorphine, which

INDIVIOR INC. v. DR. REDDY’S LABORATORIES., S.A. 3

decreases a patient’s need for opioids, and naloxone, which deters abuse. Suboxone Film is a rapidly dissolving film formulation that adheres to the underside of a patient’s tongue. One of the challenges in developing pharmaceutical films is maintaining drug content uniformity . These films are initially produced as large sheets that are then cut into individual dosage units. It is critical to ensure that the sheets have content uniformity so that the individual doses contain equal amounts of drug. Content uniformity is therefore essential to the safety of a pharmaceutical film and is a prerequisite to regulatory approval.

Indivior’s Suboxone Film is covered by U.S. Patent Nos. 9,931,305 and 8,603,514. The ’305 patent is the only patent at issue in this case. It is related to the ’514 patent , sharing the same specification. The patents’ shared specification discloses various methods of producing films that have drug content uniformity. ’305 patent col. 1 ll. 55–59. These methods generally involve mixing a pharmaceutically active ingredient with a polymer in a solvent, casting the mixture onto a planar carrier surface to form a wet film, and then controllably drying the film to produce a solid sheet having less than ten percent variance in active ingredient throughout any given area. Id. at col. 7 ll. 1–11. The resulting sheet of thin film can then be cut into individual dosage units. Id. at col. 4 ll. 50–52.

The specification teaches that conventional drying methods—which only apply warm air to the top of the wet film—produce films that do not have the claimed content uniformity. Id. at col. 9 ll. 13–18. The specification explains that conventional methods that apply heat only to the top of the film cause the water on the surface to evaporate. Id. at col. 3 l. 48–col. 4 l. 3. This creates a polymer skin barrier on the surface of the film. Id. As the temperature outside the film continues to increase, water vapor pressure builds up underneath the barrier, 4 INDIVIOR INC. v. DR. REDDY’S LABORATORIES., S.A.

ultimately ripping the surface open allowing the water vapor to escape. Id. The polymer skin then reforms and the process repeats until the film is completely dry. Id. This repeated destruction and reformation of the film surface produces uneven, non-uniform films and is known as “rippling.” Id. at col. 23 ll. 10–14.

The specification discloses controlled drying techniques that avoid the “rippling” problems produced by conventional drying methods. Id. at col. 23 ll. 10–21. The specification explains that “[t]he objective of the drying process is to provide a method of drying films that avoids complications, such as the noted ‘rippling’ effect, that are associated with conventional drying methods.” Id. at col. 23 ll. 10–14. The invention’s controlled drying techniques include applying heat to the bottom of the film, introducing controlled microwaves, controlling the air flow above and beneath the film, and employing furnace filters. Id. at col. 23 ll. 22–39, col. 54 ll. 20–21. These techniques control heat distribution during the drying process and produce content-uniform films. Id.

The Delaware Case

DRL’s predecessor in interest had previously submitted two Abbreviated New Drug Applications (“ANDA”) to market a generic version of Suboxone Film. In response, Indivior filed suit under the Hatch-Waxman Act in the District Court for the District of Delaware (“Delaware Court”) (the “Delaware Case”), alleging infringement of several patents, including the ’514 patent. Claim 62 of the ’514 patent reads:

62. A drug delivery composition comprising: (i) a cast film comprising a flowable water-soluble or water swellable film-forming matrix comprising one or more so substantially water soluble or water swellable polymers; and a desired amount of at least one active;

INDIVIOR INC. v. DR. REDDY’S LABORATORIES., S.A. 5

wherein said matrix has a viscosity sufficient to aid in substantially maintaining non-selfaggregating uniformity of the active in the matrix; (ii) a particulate active substantially uniformly stationed in the matrix; and (iii) a taste-masking agent selected from the group consisting of flavors, sweeteners, flavor enhancers , and combinations thereof to provide taste- masking of the active;

wherein the particulate active has a particle size of 200 microns or less and said flowable water -soluble or water swellable film-forming matrix is capable of being dried without loss of substantial uniformity in the stationing of said particulate active therein; and wherein the uniformity subsequent to casting and drying of the matrix is measured by substantially equally sized individual unit doses which do not vary by more than 10% of said desired amount of said at least one active.

’514 patent col. 73 l. 48–col. 74 l. 9 (emphases added).

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