A number of district courts, as well as the Court of Appeals for the Federal Circuit, have weighed in on whether and to what extent a patent challenger in an inter partes review (IPR) before the Patent Trial and Appeal Board may be estopped from making prior art based challenges in a district court litigation. … Continue Reading
U.S. patent law provides that any patent challenger initiating an inter partes review (IPR) proceeding at the United States Patent & Trademark Office (PTO) “may not assert” an invalidity ground in a patent case in U.S. district court or in the U.S. International Trade Commission that it “raised or reasonably could have raised during that inter partes review.” Despite … Continue Reading
The America Invents Act of 2011, which ushered in a new regime for post-grant patent challenges at the U.S. Patent and Trademark Office (PTO), provides that any patent challenger initiating an inter partes review (IPR) proceeding at the PTO “may not assert” an invalidity ground in a patent case in U.S. district court or in the U.S. … Continue Reading
The America Invents Act of 2011, which ushered in a new regime for post-grant patent challenges at the U.S. Patent and Trademark Office (PTO), provides that any patent challenger initiating an inter partes review (IPR) proceeding at the PTO “may not assert” an invalidity ground in a patent case in U.S. district court or in … Continue Reading
