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Divergent Patent Law Blog
Commentary on U.S patent prosecution, PTAB practice, Federal Circuit developments, and cross-border patent strategy.


Patent Prosecution Appeals in Translation: Comparing USPTO PTAB Appeals and JPO Appeals Against Examiner Refusals
Executive Summary: This article compares the USPTO ex parte appeal process before the PTAB with the JPO appeal against an examiner’s decision of refusal, using each system as a teaching framework for practitioners trained in the other. Its central point is that the two systems are analogous but not interchangeable: a USPTO appeal is triggered by the “twice rejected” rule and proceeds through a record-centered, brief-driven sequence—Notice of Appeal, Appeal Brief, Examiner’s A
Brandon Theiss
Jul 1824 min read


Mis-Mapping, Not Mini-Trial: A Case Study in the USPTO’s New Pre-Order Paper Procedure
Executive Summary: The USPTO’s new pre-order paper procedure gives patent owners a narrow but potentially consequential opportunity to challenge an ex parte reexamination request before the Office orders reexamination, but the article emphasizes that this opportunity must be framed consistently with the low SNQ threshold: the patent owner need not, and should not, try to disprove unpatentability; rather, it should show that the request misidentifies the cited reference’s teac
Brandon Theiss
Jul 1614 min read


Same Office Action, Different Stakes: Responding to USPTO Office Actions in Ex Parte Reexamination and Ordinary Patent Prosecution
Executive Summary: This article explains why responding to an Office Action in ex parte reexamination requires a different strategy than responding during ordinary patent prosecution. In ordinary prosecution, the applicant is generally trying to obtain commercially useful claim scope and may have procedural flexibility through amendment, RCE practice, or continuation practice. In reexamination, by contrast, the patent owner is defending issued rights—often in parallel with li
Brandon Theiss
Jul 413 min read
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