On August 4, 2026, the U.S. Court of Appeals for the Federal Circuit issued a precedential opinion holding that there is no presumption of irreparable harm in preliminary injunction proceedings for patent cases. The decision clarifies that patent holders must affirmatively demonstrate irreparable harm to obtain such injunctive relief, rather than relying on a presumption based on the validity of the patent.
The court acknowledged that this holding aligns with Supreme Court precedent, which has long required a showing of irreparable harm for injunctive relief. The ruling resolves a lingering question in patent law, as some lower courts had previously applied a presumption in certain circumstances. The Federal Circuit's explicit statement now provides clearer guidance for district courts and litigants.
The source notes that the decision was a long time coming, suggesting that the court's formal stance was overdue. However, the source does not discuss any dissenting opinions or potential implications beyond the immediate procedural rule. The ruling is significant for patent litigation strategy, as it may make preliminary injunctions harder to obtain, requiring more robust evidence of harm from the patent holder.