( November 7, 2023, 1:36 PM EST) -- WASHINGTON, D.C. — A dispute over a proposed generic version of the naturally occurring substance epoprostenol was remanded to a West Virginia federal judge on Nov. 6 by the Federal Circuit U.S. Court of Appeals, which said three “highly relevant” textbooks should have been considered during construction of the disputed claim term “a pH of 13 or higher.”...