Here is an update on recent en banc activity at the Federal Circuit in patent cases. Petitioners filed three new petitions, one presenting a question regarding waiver of alternative grounds for affirmance, one presenting a question regarding the burden of proving non-enablement in an inter partes review proceeding, and one presenting a question regarding injunctive relief pending a mandate. Additionally, the Federal Circuit issued an invitation for a response to a petition raising a question regarding the listing of patents in the Orange Book. Finally, a response was filed to the petition raising a question regarding injunctive relief pending a mandate. Here are the details.