Licensor Maintenance, Prosecution and Litigation. Except with respect to all Designated Countries Licensed Intellectual Property (other than Licensor’s European patent EP 2801355), effective from the Effective Date until the earlier of (a) the end of the Royalty Term or (b) (i) with respect to the U.S. Licensed Intellectual Property, the Exclusive U.S. License Effective Date and (ii) with respect to Licensor’s European patent EP 2801355 (Application No. 14172398.1), the date on which the European Opposition Proceeding has reached a final, unappealable conclusion:
