1. “Whether the Panel erred in upholding joinder of a party under 35 U.S.C. 315(c), where the joined party did not ‘properly file a petition’ for inter partes review within the statutory time limit.”
2. “Whether the Panel erred in failing to hold a time-barred joined petitioner estopped from reneging on the very conditions it voluntarily assumed to attain joinder.”
