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SALIX PHARMACEUTICALS, LTD. v. NORWICH PHARMACEUTICALS INC.

Nos. 2022-2153, 2023-1952.

SALIX PHARMACEUTICALS, LTD., SALIX PHARMACEUTICALS, INC., BAUSCH HEALTH IRELAND LTD., ALFASIGMA S.P.A., Plaintiffs-Appellants, v. NORWICH PHARMACEUTICALS INC., Defendant-Cross-Appellant.

United States Court of Appeals, Federal Circuit.

Decided: April 11, 2024.

Attorney(s) appearing for the Case

WILLIAM R. PETERSON , Morgan, Lewis & Bockius LLP, Houston, TX, argued for plaintiffs-appellants. Also represented by MICHAEL J. ABERNATHY , KARON NICOLE FOWLER , MICHAEL SIKORA , Chicago, IL; JULIE S. GOLDEMBERG , Philadelphia, PA; JOSHUA DANIEL CALABRO , SHANNON KEOUGH CLARK , STEVEN C. KLINE , ALEXIS M. MCJOYNT , SCOTT K. REED , BECKY E. STEEPHENSON , Venable LLP, New York, NY.

CHAD A. LANDMON , Axinn, Veltrop & Harkrider LLP, Hartford, CT, argued for defendant-cross-appellant. Also represented by MATTHEW BECKER , REBECCA L. CLEGG , THOMAS K. HEDEMANN , MATTHEW S. MURPHY .

IRENA ROYZMAN, Kramer Levin Naftalis & Frankel LLP, New York, NY, for amici curiae Regeneron Pharmaceuticals, Inc., Ocular Therapeutix, Inc. Also represented by CHRISTINE WILLGOOS; PAUL BRZYSKI, Washington, DC.

PAUL WHITFIELD HUGHES, III, McDermott Will & Emery LLP, Washington, DC, for amicus curiae Vanda Pharmaceuticals Inc. Also represented by CHRISTOPHER MICHAEL BRUNO, SARAH HOGARTH, APRIL ELISE WEISBRUCH.

Opinion dissenting-in-part filed by CUNNINGHAM.

Salix Pharmaceuticals, Ltd., Salix Pharmaceuticals, Inc., Bausch Health Ireland Ltd., and Alfasigma S.P.A. (collectively, "Salix") appeal from a final judgment of the United States District Court for the District of Delaware holding claim 2 of U.S. Patent 8,309,569, claim 3 of U.S. Patent 10,765,667, claim 4 of U.S. Patent...

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