In an inter partes review proceeding, the petitioner first files a petition to challenge the validity of a patent. In response to the petition, the patent owner can file a POPR. Typically, the PTAB then decides whether to institute an IPR trial. In recent years, the rules have provided petitioners with an option to reply to the POPR. But such replies are not available as a matter of right—petitioners must request leave to file from the PTAB.

The PTAB has discretion to either grant or deny the request, depending on whether the request satisfies “a showing of good cause” under 37 C.F.R. § 42.108(c). If the PTAB grants the request, then typically, the petitioner and patent owner both receive authorization to file another brief paper, usually around five pages, before the PTAB issues an institution decision.

To date, it has not been clear what qualifies as “good cause” when a petitioner decides to reply to the POPR. Is the filing of a reply a strong predictor of the institution decision? We analyzed the role of petitioners’ replies to POPRs in recent PTAB proceedings, and our research provides a fresh view on the replies’ impact on corresponding institution decisions. In addition, our findings include updated practice tips for IPR practitioners.


Continue Reading What Qualifies as a Good “Good Cause” When Responding to a Patent Owner’s Preliminary Response?