ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,454, issued on Aug. 19, was assigned to PLASTIC OMNIUM NEW ENERGIES FRANCE (Lyons, France).
"Method for performing pressure tests on a composite pressure vessel and device for manufacturing and pressure testing the composite pressure vessel" was invented by Denis Thibaut (Brussels).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for performing pressure tests on a composite pressure vessel, including providing a composite pressure vessel with at least one opening an injection of a liquid; injecting the liquid in the composite pressure vessel through the at least one opening to reach a threshold pressure; measuring an external volume variation ...