ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,991, issued on Sept. 30, was assigned to RTX Corp. (Farmington, Conn.).

"Reverse flow hydrogen steam injected turbine engine" was invented by Jesse M Chandler (S Windsor, Conn.), Marc J Muldoon (Marlborough, Conn.), Jon E Sobanski (Glastonbury, Conn.), Neil J Terwilliger (Cheshire, Conn.) and Joseph B Staubach (Colchester, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A propulsion system for an aircraft includes a gas generating core engine generates an exhaust gas flow that is expanded through a turbine section, a power turbine driven by the exhaust gas flow, a propulsor coupled to the power turbine, a hydrogen fuel system configured to sup...