ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,337, issued on July 8, was assigned to General Electric Co. (Evendale, Ohio).

"Sub-coolers for refueling onboard cryogenic fuel tanks and methods for operating the same" was invented by Constantinos Minas (Niskayuna, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sub-cooler for a sub-cooling cryogenic refueling system is disclosed herein. The sub-cooler includes a first valve to separate flowing cryogenic fuel into a primary flowline and an auxiliary flowline, a second valve to reduce the saturated pressure and temperature of the cryogenic fuel in the auxiliary flowline, a cryogenic heat exchanger to transfer heat from the primary flowline to ...