Kyle Bass vows to keep returning to the PTAB “kangaroo court”

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

Kyle Bass vows to keep returning to the PTAB “kangaroo court”

If Kyle Bass has been put off by the PTAB denying three of his IPR petitions, he's not showing it. He has filed a further nine petitions since the Coalition for Affordable Drugs' first setback and has labelled the PTAB a kangaroo court

kyle20bass20150.jpg

It has been a bad couple of weeks for hedge fund manager Kyle Bass’s efforts to get pharmaceutical companies’ patents invalidated. The Patent Trial and Appeal Board has denied three of the Coalition for Affordable Drugs’ petitions – two challenging patents covering Acorda’s Ampyra drug and one covering Biogen’s Tecfidera treatment.

Bass is not taking it lying down – he has slammed the Board and USPTO director Michelle Lee while continuing to file inter partes review petitions.

“It appears to me, after the Biogen ruling, that Michelle Lee and the US Patent and Trademark Office are running a kangaroo court,” Bass told Business Insider. He added that Lee should “stick to calling balls and strikes” instead of forwarding a political agenda.

He told the Wall Street Journal he would persist in his campaign. “I’ve spent years of my life working on this and my arguments are as good as can be. I think I can win if they’ll just hear the cases on the merits,” he said.

True to his word, he has filed nine more petitions since the Board issued its first denial of a Coalition for Affordable Drugs petition on August 24, bringing his total number of petitions to 32.

Pepper Hamilton, which represents Acorda and the University of Pennsylvania on various matters, noted the manner of the Board’s denials so far may have given Bass hope. “However, in each instance, the PTAB reached decisions on the merits of the hedge fund’s petitions. The fact that the PTAB considered the petitions and did not exercise its discretion to reject them outright based on the fund’s primary goal of depressing stock prices, was all the encouragement Bass needed,” said Pepper Hamilton partner Tom Engellenner.

According to Docket Navigator, the nine recent petitions comprised four more targeting Acorda patents, three targeting Insys Pharma patents and three targeting Trustees of the University of Pennsylvania patents.

more from across site and SHARED ros bottom lb

More from across our site

The team, comprising two partners and one senior consultant, plans to offer “highly differentiated” services to clients
HGF’s new ownership model frees it from the hiring constraints of traditional partnerships, its CEO told Managing IP
New timeline for 2026 aims to provide clearer guidance to firms and practitioners on the full jurisdictional market view
Attorneys contemplate whether clients using AI for legal guidance is beneficial to attorney-client relationships or more of a nuisance
Richard de Bodo, who had a lengthy career at international firms, shares how he will address client needs and praises the unique offerings of smaller firms
An Australian top court decision clarifying honest concurrent use and wins by publishers against AI platforms were also among the top talking points
AIPPI has pulled the plug on its planned 2027 World Congress, and INTA has delayed hosting a meeting there, but the concerns won’t abate
Despite being outspent by a wealthy opponent, a trial attorney at King & Spalding says ‘relentless pursuit of the truth’ helped his team secure a $420m damages award for mobile gaming client
190 drugs face loss of exclusivity between 2026 and 2030, with the list including Bristol Myers Squibb’s blood-thinning drug Eliquis and immunotherapy medication Opdivo
Nokia, represented by a team from Bird & Bird, adjudged to have made fair offer to Asus and Acer in UK SEP dispute
Gift this article