Mealey's (March 20, 2019, 1:40 PM EDT) -- WILMINGTON, Del. — Asbestos claimants have asked the Third Circuit U.S. Court of Appeals to decide the validity of their challenge to the constitutionality of allowing former Chapter 11 debtor Energy Future Holdings Corp. (EFH) to discharge claims of future but yet unknown disease sufferers, with their opening arguments due next month, according to a March 18 scheduling order (In re: Energy Future Holdings, et al., No. 19-1430, 3rd Cir.)....