DENVER - Primary parties challenging a settlement in a class complaint alleging that ExxonMobil Oil Corp. breached thousands of oil and gas leases failed to timely object to an appeal-bond requirement and, thus, are bound by it, the 10th Circuit U.S. Court of Appeals ruled Dec. 16 (Jimmie Hershey, et al. v. ExxonMobil Oil Corporation, No. 12-3309, 10th Cir.; 2013 U.S. App. LEXIS 24888).