Amerigen Pharmaceuticals, Ltc. v. UCB Pharma GMBH, No. 17-2596 (Fed. Cir. 2019)Annotate this Case
UCB’s 650 patent, which covers certain chemical derivatives of 3,3- diphenylpropylamines, including a compound called fesoterodine. Fesoterodine is an antimuscarinic drug marketed as Toviaz® to treat urinary incontinence. In inter partes review, the Patent and Trademark Office Patent Trial and Appeal Board held that certain claims were not unpatentable as obvious, 35 U.S.C. 103. The Federal Circuit affirmed, first rejecting UCB’s argument that Amerigen lacked standing because the FDA will not approve Amerigen’s abbreviated new drug application until the expiration of the 650 patent in 2022, so that there was no possibility of infringement. The evidence supported the Board’s finding that the Amergen neither established a general motivation to make a 5-HMT prodrug nor proved that the specific claimed modifications would have been obvious.