The US Court of Appeals for the Federal Circuit determined that it lacked appellate jurisdiction over a district court judgment confirming an arbitration award stemming from a dispute over royalties paid under patent license and supply agreements. The Court concluded that the petition did not “necessarily raise” a substantial issue of patent law. Acorda Therapeutics Inc. v. Alkermes PLC, Case No. 2023-2374 (Fed. Cir. July 25, 2025) (Taranto, Hughes, Stark, JJ.)
Acorda Therapeutics, the developer of Ampyra®, a treatment for multiple sclerosis, licensed a patent from Alkermes covering Ampyra’s active ingredient. In exchange, Acorda paid running royalties and sourced the active ingredient directly from Alkermes. Although the patent expired in July 2018, Acorda continued making royalty payments for two years without formal protest.
In July 2020, Acorda challenged the ongoing payments and initiated arbitration. Acorda sought a declaration that the licensing royalty provision was unenforceable after the patent’s expiration and sought recovery of royalties paid after July 2018, invoking unjust enrichment. The arbitration tribunal agreed that the royalty provision was unenforceable after the patent’s expiration. However, it limited Acorda’s recovery to payments made under formal written protest, which only started in July 2020. This ruling relied on a state law principle that payments made with full knowledge of the facts, even if under a mistake of law, are not recoverable unless accompanied by written protest.
Acorda filed suit in federal district court under the Federal Arbitration Act, invoking diversity jurisdiction. It sought confirmation of the tribunal’s findings, except for the denial of recoupment of more than $65 million in unprotested payments made between 2018 and 2020. Acorda argued that the tribunal’s refusal to allow full recoupment constituted “manifest disregard” of the law and offered two alternative theories: the tribunal improperly applied state law in derogation of federal patent law, and the award effectively enforced an illegal licensing agreement. The district court upheld the tribunal’s award. Acorda appealed.
The Federal Circuit declined to reach the merits and instead examined its jurisdiction. Under the “well-pleaded complaint” rule, the Federal Circuit’s jurisdiction applies only if patent law creates the cause of action or the plaintiff’s right to relief necessarily depends on resolving a substantial question of patent law.In its 1988 decision in Christianson v. Colt Industries and 2013 decision in Gunn v. Minton, the Supreme Court made clear that situations falling within the “special and small” second category (where right to relief necessarily depends on resolution of a substantial question of patent law) are “extremely rare.”
Here, Acorda’s complaint did not assert a patent cause of action. The request to confirm the arbitration award could be resolved without judicial interpretation of patent law. The Federal Circuit also noted that even the modification request, although it was premised on the award’s finding of unenforceability, presented two alternative arguments, only one of which involved patent law. Because the district court could have ruled for Acorda without addressing patent law, the Federal Circuit concluded that patent law was not “necessarily raised.” As a result, the Federal Circuit lacked jurisdiction over the appeal.
Practice note: When drafting a case-initiating document in district court, consider your desired appellate forum. If you intend to direct your appeal to the Federal Circuit, ensure your pleading clearly invokes patent law as a necessary element of your claim(s).
