Shutkas Electric, Inc. v. Ford Motor Co., 366 Ill. App. 3d 76, 80 (2006) (citing Diggs v. Suburban Medical Center, 191 Ill. App. 3d 828, 836 (1989)). As to the denial of defendants' motion for summary judgment on the remainder of plaintiff's federal claims, that portion of the judgment became final after plaintiff did not appeal the decision by the Seventh Circuit. See Illinois Department of Healthcare and Family Services ex rel. Hanhardt v. Trinza, 2014 IL App (1st) 130829, ΒΆ 28 (" 'A judgment is res judicata where an appeal has not been perfected ***.' " (quoting In re Application of Cook County Collector, 228 Ill. App. 3d 719, 736 (1991)).