United States: Claim Construction Leads To Unpatentability For Lack Of Written Description Support - Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

In Tokyo Ohka Koygo., Ltd. v. Fujifilm Electronic Materials U.S.A., Inc., PGR2022-00010, Paper 28 (P.T.A.B. May 31, 2023), the Patent Trial and Appeal Board ("the Board") held all challenged claims unpatentable for obviousness.