Two Bass IPRs fail at PTAB but more cases filed

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

Two Bass IPRs fail at PTAB but more cases filed

Kyle Bass

The PTAB has declined to institute inter partes reviews brought against two of Acorda Therapeutic's patents covering its multiple-sclerosis drug, finding that the posters cited in evidence did not qualify as prior art

Kyle Bass

Yesterday's rulings are setbacks to the Coalition for Affordable Drugs' campaign to file IPRs against pharmaceutical patents, though it has filed new cases against three pharmaceutical companies in the past week.

According to critics, fund manager Kyle Bass (right) and nXn owner Erich Spangenberg, who formed the Coalition, are using IPRs to drive down share prices of patent holders in order to benefit from short positions on those stocks. Following yesterday’s rulings, Acorda’s shares surged 28%.

The Coalition had targeted two US patents (numbers 8,007,826 B2 and 8,663,685 B2) covering Acorda's Ampyra drug on the ground of obviousness, citing as evidence two posters that it argued constituted prior art. In two separate but largely identical written decisions, the PTAB disagreed, finding that the two posters were not prior art because they were not "printed publications".

The Board noted that the Coalition did not state that the posters were distributed and indexed, leading it to look at four factors to determine whether the posters were printed publications. The four factors are:

1. the length of time of the display;

2. the expertise of the target audience;

3. whether there were expectations that the displayed materials would not be copied; and

4. the ease with which the material would have been copied.

Analysing the posters under these factors, the Board found that the Coalition presented no evidence as to the length of time of display and the expertise of the target audience. It also found that the information on the posters was densely packed and complex, making it hard to copy.

Because of these four findings, the Board found that the Coalition did not show that the posters were printed publications, and thus did not constitute prior art under Section 102(b).

The battle and the war

In the past week alone, the Coalition has filed three IPRs against patents owned by Insys Pharma, Hoffman-La Roche and Anacor Pharmaceuticals

The Coalition's attack on Acorda's patents is part of its campaign to challenge pharmaceutical patents through the use of IPRs.

Both supporters and opponents of patent reform have criticised the group, with Darrell Issa arguing that Bass and Spangenberg's actions should be illegal and Gene Quinn pointing to the IPRs as an unintended consequence of earlier attempts to reform the patent system with the AIA.

The Coalition's targets are also fighting back, with Celgene moving for sanctions on the grounds that the IPRs are motivated by profit.

However, the Coalition is unlikely to be disappearing anytime soon. Even though its IPRs against Acorda's patents have failed, it has 26 cases pending, including its action against Celgene.

In the past week alone, the Coalition has filed three IPRs against patents owned by Insys Pharma (filed by Law Offices of Gregory J Gonsales and McNeeley Hare & War on August 24), one challenging a patent owned by Hoffman-La Roche (filed by Neifeld IP Law on August 22) and three against patents owned by Anacor Pharmaceuticals (filed by Merchant & Gould on August 20).

more from across site and SHARED ros bottom lb

More from across our site

Matteo Di Lernia, advocate at LCA Studio Legale, unpicks the CJEU’s ruling in M.M. Ristorazione v Villa Ramazzini, including its impact on litigation strategies
Leaders at IP boutique say the decision to pursue sponsorless partnership with the specialised investment arm of a private equity firm comes at a time of ‘profound transformation’ in the profession
Patrick Zhang, formerly of Atlassian and TiVo, will become Via’s vice president of licensing and commercial strategy, tasked with helping expand client partnerships and licensing deals
IP services firm says new platform will cut patent portfolio analysis from months to minutes and optimise monetisation efforts
New role for the High Court judge will leave a gap for an IP specialist judge at the first instance
Laura Achával, founder of Achával IP in Argentina, shares how an evolving vision led her to launch her own practice
Monetisation is standing at the forefront of patent development, and one firm says AI is increasingly being deployed
Data centres are being built across the US, prompting patent disputes, but Texas’s thriving tech industry and patent-ready courts make the state particularly ‘ripe’ for litigation
Carpmaels & Ransford is set to bolster its UK attorney team with the appointment of Simmons & Simmons’s head of IP in the UK
Updates on Nokia’s licensing strides and a surge in patent activity around battery recycling in Australia were also among the top talking points
Gift this article