CHICAGO - The Seventh Circuit U.S. Court of Appeals on Aug. 9 ruled that the statute of limitations barred claims by certain cash balance plan participants who alleged that the plan violated the Employee Retirement Income Security Act in calculating lump-sum distributions paid to participants who left their employment before reaching normal retirement age (Lawrence G. Ruppert, et al. v. Alliant Energy Cash Balance Pension Plan, No. 12-3067, 7th Cir.; 2013 U.S. App. LEXIS 16572).