Tag Archives: 325(d)

Estoppel Prevents Second IPR Petition Even When New References Were Missed By First Search

PTAB-Blog-Graphics-180x110_Institution-Denied
In a case that appears to be a case of first impression, the PTAB found in its decision denying institution in IPR2016-00781 that a final written decision in an earlier IPR created estoppel under 35 U.S.C. § 315(e)(1), preventing a second IPR petition from being instituted that used additional references which reasonably could have been raised before, even though … Continue reading this entry

PTAB Institutes Trial On Previously Challenged Cabilly Patent

institution-abs-dark
The Cabilly ’415 patent is well known in the bio/pharma space as relating to the artificial synthesis of antibody molecules. The Cabilly ‘415 patent’s notoriety was aided by a previous interference, a merged ex parte reexamination proceeding, and several Federal District Court Litigations. Nevertheless, Petitioners Sanofi-Aventis and Regeneron Pharmaceuticals petitioned for inter partes review (IPR2015-01624), … Continue reading this entry

Estoppel Versus Discretion: How is the PTAB Deciding Multiple Petitions Against the Same Patent?

decision in IPR2015-00881
The PTAB has denied petitions filed by the same petitioner against the same claims, even where the subsequent petition relied upon completely different prior art (IPR2014-00506), reasoning that a petitioner should not hold back its best references for a subsequent attempt.  But what happens when the same petitioner files a new petition (after a first petition is denied) against … Continue reading this entry