Filer of an ANDA Paragraph III Certification has Standing to Appeal from PTAB in IPR
The ‘650 patent covers a compound called fesoterodine, which is an antimuscarinic drug marketed as Toviaz® and used to treat urinary incontinence. Mylan Pharmaceuticals petitioned for IPR of the ‘650 patent alleging certain claims were obvious. After institution of the IPR, Amerigen and two other companies joined as parties to the proceeding. After the PTAB’s finding that the challenged claims were not unpatentable, Amerigen—but not Mylan—appealed the decision.
On appeal, UCB asserted Amerigen lacked standing. Specifically, UCB argued that, based on the Paragraph III certification accompanying Amerigen’s abbreviated new drug application (ANDA), the FDA will not approve Amerigen’s ANDA until the expiration of the ‘650 patent, previously upheld in a separate suit in the District of Delaware, in 2022. Consequently, UCB contends Amerigen is foreclosed from infringing the ‘650 patent, and without a possibility of infringement there can be no justiciable dispute.
The Federal Circuit rejected UCB’s argument for several reasons. First, this case did not arise under the Hatch-Waxman Act. Second, Amerigen did not rely a risk of infringement liability as a basis for injury. Rather, Amerigen pointed to a concrete commercial injury that it incurred from the listing of the ’650 patent in the Orange Book, which was only possible so long as the ’650 patent was not found invalid. Specifically, the listing of the ‘650 patent blocked the launch of Amerigen’s tentatively approved ANDA, and invalidation of the patent would advance its drug’s launch.