1. “Whether, in a pending case, a court can refuse to entertain a constitutional, separation-of-powers challenge based on an intervening change of law on the grounds of forfeiture.” 2. “Whether the Federal Circuit’s obviousness holding is an unwarranted expansion of this Court’s decision in KSR International Co. v. Teleflex, Inc., 550 U.S. 398 (2007), and is inconsistent with the Patent Act.”