US courts in “disarray” over irreparable harm

Managing IP is part of Legal Benchmarking Limited, 1-2 Paris Gardens, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

US courts in “disarray” over irreparable harm

Attendees were updated on the confusing approach to irreparable harm in U.S. courts at the INTA Annual Meeting in the session The Presumption of Irreparable Harm: Don’t Stop Believing

Two Supreme Court decisions in the past decade threw the viability of this presumption into question. The first was eBay v. MercExchange in 2006 in which the Supreme Court announced a test for injunctive relief that required the plaintiff prove “that it has suffered an irreparable injury”. This was followed by Winter v. Natural Resources Defense Council in 2008, which held that a party seeking a preliminary injunction must show that irreparable harm is “likely”, and not just “possible” as had been ruled by the Ninth Circuit.

Kent Raygor of Sheppard Mullin Richter & Hampton, said there had been “so much disarray in Federal Circuit and district courts since eBay and Winter.” Although eBay was a patent case and Winter was an environmental injury case, Raygor noted the effect on trademark cases had been profound. “Injunctions had long been a favored remedy in trademark cases,” he said.

Susan Kayser of Jones Day said different policies were leading courts to different approaches. The Fourth, Sixth and Seventh Circuits are courts where presumption still likely applies. Courts where it is unclear are the First, Third, Fifth, Eight, Tenth, Eleventh and DC Circuits, and the Federal Circuit. “This is leading to some uncertainty and some forum shopping,” said Kayser. The Second and Ninth Circuits are courts where presumption definitely does not apply.

In the Q&A section of the session, audience member David Bernstein of Debevoise & Plimpton noted that Ferring Pharmaceuticals v. Watson Pharmaceuticals also addressed the issue of irreparable harm. Bernstein filed an amicus brief in the case, which is on appeal to the Third Circuit, on behalf of INTA last year. The brief said the court should hold that a showing of likelihood of success under the Lanham Act continues to give rise to a rebuttable presumption of irreparable harm and that such a presumption is not inconsistent with the Supreme Court’s decisions in eBay and Winter. This longstanding presumption remains appropriate in Lanham Act cases, said the brief, because the injury that results from false advertising and trademark violations is inherently unquantifiable and, as such, irreparable.

more from across site and SHARED ros bottom lb

More from across our site

Shwetasree Majumder, managing partner of Fidus Law Chambers, discusses fighting gender bias and why her firm is building a strong AI and tech expertise
Hady Khawand, founder of AÏP Genius, discusses creating an AI-powered IP platform, and why, with the law evolving faster than ever, adaptability is key
UK firm Shakespeare Martineau, which secured victory for the Triton shower brand at the Court of Appeal, explains how it navigated a tricky test regarding patent claim scopes
The firm’s managing partner said the city is an ‘exciting hub of ideas and innovation’
In our latest podcast, Deborah Hampton talks through her hopes for the year, INTA’s patent focus, London 2026, and her love of music
Tech leads at three IP service groups discuss why firms need to move away from off-the-shelf AI products and adopt custom solutions
IP firms say they have been educating some clients on AI use, with ‘knowledge-sharing’ becoming more prevalent
As the US patent system tilts further toward favouring patent owners, firms with a strong patentee focus can get ahead of the game
Amanda Yang and Rachel Tan at Rouse and Landy Jiang at Lusheng Law Firm provide an overview of the draft amendments to China’s trademark law
News of EIP launching an AI platform and a trade secret blow for TCS in the US were also among the top talking points
Gift this article