ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,485,657, issued on Dec. 2, was assigned to ARKEMA FRANCE (Puteaux, France).
"Multi-layer structure for storing hydrogen" was invented by Jean-Jacques Flat (Serquigny, France) and Patrick Dang (Serquigny, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "Multi-layer structure intended for storing hydrogen, including, from the inside out, a sealing layer and a composite reinforcing layer, the innermost composite reinforcing layer being wound around the outermost adjacent sealing layer, at least the innermost sealing layer being made of a composition including: a. 20.5 to 99.845% by weight of a polyamide; b. 0.005 to 0.5% by weight of a catalyst; c. 0.0...