E.I. DuPont de Nemours & Co. v. Unifrax I LLC, No. 17-2575 (Fed. Cir. Apr. 17, 2019)

From the Opinion

The passage below is extracted verbatim from the opening of the document. It has not been editorially summarized — consult the full opinion for the court's complete reasoning.

This appeal arises from a patent infringement suit filed in the U.S. District Court for the District of Delaware. De- fendant-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 I LLC ’s flame barrier product infringed the asserted patent and that Unifr ax I LLC failed to prove the asserted patent was invalid .