Bass files 16th IPR petition as opposition continues to build

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

Copyright © Legal Benchmarking Limited and its affiliated companies 2025

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

Bass files 16th IPR petition as opposition continues to build

Kyle Bass has filed another IPR petition targeting a pharma company, taking aim again at the Vimovo pain reliever, while IPO has passed a resolution opposing the use of post-grant proceedings to manipulate the market

kyle20bass20150.jpg

The Coalition for Affordable Drugs has filed its 16th inter partes review (IPR) petition, taking aim for a second time at the Vimovo treatment made by Pozen and sold by Horizon Pharma in the US. Vimovo is an arthritis pain reliever.

Kyle Bass, who runs hedge fund Hayman Capital, and Erich Spangenberg, owner of nXn Partners, are behind the coalition. IP Nav is also involved.

I spoke to Bass last month for our June cover story and he made very clear that he is serious about taking on pharmaceutical and biotech companies through Patent Trial and Appeal Board proceedings and that he will not give up.

You can read the full story, including an analysis of Bass’s strategy, the response from IP practitioners and trade groups, and the potential action from Congress and the Board here (only available to subscribers and trialists – you can take out a trial to the site here).

Bass underlined that he is filing merit-based IPRs with the expectation of seeing the challenge through to a final decision by the PTAB. Hayman Capital says it will not accept settlement payments to drop its challenges.

Bass praised the IPR system. "It is very pro-competitive," he told me. "It was designed to mine-clear patent trolls in the tech space, and now it is allowing firms like ours to challenge patent squatters."

Pharma and bio patent owners have not taken lightly to Bass’s provocation. BIO labeled his strategy “a new door to abuse of the patent system”, and accused him of using PTAB proceedings to short sell stock.

Last week, the PATENT Act was reported to the full Senate and included a new provision allowed the PTAB to deny petitions “in the interest of justice”. This was likely drafted with PTAB strategies such as Bass's in mind. 

And this week IPO passed a resolution opposing the use of post-grant proceedings to manipulate the market.

The resolution said: “IPO believes it is an abuse to file AIA petitions for post grant proceedings by persons who have a significant bet against, or short, of the shares of the patent owners owning the patents challenged in the petitions; now, therefore, IPO urges the United States Patent and Trademark Office to use its discretion to deny petitions filed by such persons.”



Only 30% of our content is published on our blog – to access all of our content you need to be a subscriber.

We like to offer our loyal blog readers a special rate, so register your interest in coming on board as a subscriber and we will be in touch shortly.

  

more from across site and SHARED ros bottom lb

More from across our site

IP lawyers at three firms reflect on how courts across Australia have reacted to AI use in litigation, and explain why they support measured use of the technology
AJ Park’s owner, IPH, announced earlier this week that Steve Mitchell will take the reins of the New Zealand-based firm in January
Chris Adamson and Milli Bouri of Adamson & Partners join us to discuss IP market trends and what law firm and in-house clients are looking for
Noemi Parrotta, chair of the European subcommittee within INTA's International Amicus Committee, explains why the General Court’s decision in the Iceland case could make it impossible to protect country names as trademarks
Inès Garlantezec, who became principal of the firm’s Luxembourg office earlier this year, discusses what's been keeping her busy, including settling a long-running case
In the sixth episode of a podcast series celebrating the tenth anniversary of IP Inclusive, we discuss IP Futures, a network for early-career stage IP professionals
Rachel Cohen has reunited with her former colleagues to strengthen Weil’s IP litigation and strategy work
McKool Smith’s Jennifer Truelove explains how a joint effort between her firm and Irell & Manella secured a win for their client against Samsung
Tilleke & Gibbins topped the leaderboard with four awards across the region, while Anand & Anand and Kim & Chang emerged as outstanding domestic firms
News of a new addition to Via LA’s Qi wireless charging patent pool, and potential fee increases at the UKIPO were also among the top talking points
Gift this article