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E.I. DU PONT DE NEMOURS & COMPANY v. UNIFRAX I LLC

2017-2575.

921 F.3d 1060 (2019)

E.I. DU PONT DE NEMOURS & COMPANY, Plaintiff-Appellee, v. UNIFRAX I LLC, Defendant-Appellant.

United States Court of Appeals, Federal Circuit.

Decided: April 17, 2019.

Attorney(s) appearing for the Case

Christopher Landgraff , Bartlit Beck LLP, Chicago, IL, argued for plaintiff-appellee. Also represented by Sharon Desh , Mark Leslie Levine .

Jacob M. Holdreith , Robins Kaplan LLP, Minneapolis, MN, argued for defendant-appellant. Also represented by Brenda L. Joly , David Allen Prange .

Dissenting opinion filed by Circuit Judge O'Malley.

This appeal arises from a patent infringement suit filed in the U.S. District Court for the District of Delaware. Defendant-Appellant Unifrax I LLC appeals from the district court's claim construction and denial of its motions for judgment of non-infringement and invalidity as a matter of law after a jury found that Unifrax...

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