In a case relating to a patented method for treating multiple sclerosis, the US Court of Appeals for the Federal Circuit found that patent term extension (PTE) only applies to methods of using the approved product as defined under the relevant statute, 35 U.S.C. § 156, even if the patent claim is broad enough to cover methods of using additional compounds. Biogen International GMBH v. Banner Life Sciences LLC, Case No. 20-1373 (Fed. Cir. Apr. 20, 2020) (Lourie, J.).