MOMENTA PHARMACEUTICALS, INC. v. BRISTOL-MYERS SQUIBB COMPANY
Contributed by Knobbe Martens. Originally published on Patexia; republished here as part of the LexDana archive.
Federal Circuit Summary
Before Newman, Dyk, and Chen. Appeal from the Patent Trial and Appeal Board.
Summary: An injury-in-fact is required to establish Article III standing for judicial review of agency action, even if a statute permits such review.
Momenta Pharmaceuticals, Inc. (“Momenta”) requested inter partes review (“IPR”) of a patent owned by Bristol-Myers Squibb Company (“BMS”). The patent covers a product that BMS markets under the brand name Orencia®. At the time Momenta petitioned for IPR, it was reportedly attempting to develop a biosimilar counterpart to the Orencia® product. The PTAB sustained patentability of the claims. Momenta appealed to the Federal Circuit.
The Federal Circuit dismissed Momenta’s appeal for lack of standing and mootness. BMS argued that Momenta lacked standing because its proposed product had failed clinical trials and had been withdrawn. Momenta responded that it had not abandoned its intent to produce the biosimilar, and that it was injured by the IPR estoppel statute. However, press releases and SEC filings from Momenta revealed that it had terminated its participation in the development program for the biosimilar. The Federal Circuit held that because of this termination, Momenta had failed to show “an invasion of a legally protected interest” that was “actual or imminent, not conjectural or hypothetical.” Further, IPR estoppel did not create an injury-in-fact because Momenta was no longer engaged in any activity that would give rise to a possible infringement suit. Thus, Momenta lacked standing to appeal. The Federal Circuit also determined that the appeal was moot because Momenta ceased the potential infringement and thus ended the potential for injury. Therefore, the Federal Circuit dismissed the appeal.
This case is: MOMENTA PHARMACEUTICALS, INC. v. BRISTOL-MYERS SQUIBB COMPANY
Edited by: Paul Stewart
Written by: Jacob R. Rosenbaum and Jeremy Anapol
More insights
Fresh From the Bench: Latest Precedential Patent Case
Ridge Corp. et al. v. Kirk NationaLease Co. et al. , Appeal No. 2025-1254 (Fed. Cir. July 13, 2026) In its only precedential patent opinion last week, the Federal Circuit considered an appeal of a preliminary injunction issued by the U.S. District Court…
Fresh From the Bench: Latest Precedential Patent Cases
CASE OF THE WEEK Wyeth LLC v. AstraZeneca Pharmaceuticals LP , Appeal No. 2024-2325 (Fed. Cir. July 9, 2026) In our Case of the Week, the Federal Circuit affirmed a district court ruling reversing a $107.5 million jury verdict against AstraZeneca in a case…
Enanta Pharmaceuticals, Inc. v. Pfizer Inc., Appeal No. 2025-1427 (Fed. Cir. Jun. 23, 2026)
CASE OF THE WEEK Enanta Pharmaceuticals, Inc. v. Pfizer Inc., Appeal No. 2025-1427 (Fed. Cir. Jun. 23, 2026) In our Case of the Week, the Federal Circuit affirmed summary judgment invalidating all claims of Enanta’s Patent No. 11,358,953 as…