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ARCELORMITTAL FRANCE v. AK STEEL CORP.

Nos. 2014-1189, 2014-1190, 2014-1191.

786 F.3d 885 (2015)

ARCELORMITTAL FRANCE, ArcelorMittal Atlantique et Lorraine, ArcelorMittal USA LLC, Plaintiffs-Appellants v. AK STEEL CORPORATION, Severstal Dearborn, Inc., Wheeling-Nisshin Inc., Defendants-Appellees ArcelorMittal France, ArcelorMittal Atlantique et Lorraine, ArcelorMittal USA LLC, Plaintiffs-Appellants v. AK Steel Corporation, Defendant-Appellee ArcelorMittal France, ArcelorMittal Atlantique et Lorraine, ArcelorMittal USA LLC, Plaintiffs-Appellants v. Severstal Dearborn LLC, Wheeling-Nisshin Inc., Defendants-Appellees.

United States Court of Appeals, Federal Circuit.

May 12, 2015.

Attorney(s) appearing for the Case

Constantine L. Trela, Jr., Sidley Austin LLP, Chicago, IL, argued for plaintiffs-appellants. Also represented by David T. Pritikin;   Rachel Heather Townsend, Washington, DC; Jeffrey B. Bove, Wilmington, DE.

Christopher Neil Sipes, Covington & Burling LLP, Washington, DC, argued for defendants-appellees. Defendant-appellee AK Steel Corporation also represented by Jeffrey Howard Lerner,   Roderick R. McKelvie. Defendants-appellees Severstal Dearborn, Inc., Wheeling-Nisshin Inc. represented by Richard William Hoffmann,   David J. Simonelli, Reising Ethington PC, Troy, MI.

Before DYK, WALLACH, and HUGHES, Circuit Judges.

ArcelorMittal appeals from the decisions of the United States District Court for the District of Delaware granting summary judgment that U.S. Patent No. RE44,153E (the RE153 patent) is invalid because certain claims were broadened after two years of issuance in violation of 35 U.S.C. § 251.1

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