Mealey's (September 19, 2018, 10:39 AM EDT) -- WILMINGTON, Del. — A Delaware federal judge on Sept. 17 affirmed a bankruptcy court’s finding that the interest rate in the reorganization plan for former Chapter 11 debtor W.R. Grace & Co. must be used when determining how much the Internal Revenue Service owes the company for a tax refund (United States v. W.R. Grace & Co., et al., No. 17-cv-1588, D. Del., 2018 U.S. Dist. LEXIS 157895)....