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District Court Extends IPR Estoppel To Non-Petitioned Invalidity Grounds, PTAB Litigation Blog

March 2019

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Presidio Components, Inc. ("Presidio") petitioned for inter partes review (IPR) of U.S. Patent No. 6,144,547 (the "'547 Patent"), which American Technical Ceramics Corp. and AVX Corporation (together "plaintiffs") asserted against Presidio in American Technical Ceramics Corp. et al v. Presidio Components, Inc., 2-14-cv-06544 (E.D.N.Y). After the IPR proceedings, Presidio asked the District Court for leave to amend its invalidity contentions for the ‘547 Patent to raise new invalidity grounds that were not included in the IPR petition.

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