When the Director of the Patent Office determines there is a reasonable likelihood a petitioner will prevail on one or more challenges to patent claims, he institutes an inter partes review of the patent.  This decision holds that once review is thus commenced, the Patent Office must decide the patentability of all of the claims the petitioner has challenged.

United States Supreme Court (Gorsuch, J; Ginsburg, Breyer, Sotomayor, & Kagan, JJ., dissenting); April 24, 2018; 2018 U.S. LEXIS 2629