Here is an update on recent en banc activity at the Federal Circuit in patent cases. The court received three new petitions raising questions related to estoppel arising from inter partes review, the legal standard for overruling prior precedential decisions, claim construction, and the standard for the Patent Trial and Appeal Board to evaluate substitute claims and a motion to amend claims. The court also invited responses to four petitions raising questions related to the presumption of nexus in a non-obviousness analysis; the process and standard for determining indefiniteness; and choice of law, forum selection clauses, and injunctive relief. Finally, the court denied a petition raising questions related to the assignment of patents and standing. Here are the details.