 MORRISVILLE, N.C., Oct. 08, 2021 GLOBE NEWSWIRE -- Liquidia Corporation NASDAQ: LQDA announced today that the U.S. Patent Trial and Appeal Board PTAB ruled in its favor in the Inter Partes Review IPR proceeding against U.S. Patent No. 9,604,901 901 patent owned by United Therapeutics Corporation UTC and listed in the Orange Book for Tyvaso treprostinil inhalation solution. 