ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,426, issued on Aug. 19, was assigned to EMS-CHEMIE AG (Domat/Ems, Switzerland).
"Multilayer fuel line" was invented by Heinz Caviezel (Masein, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A plastic line including at least an inner layer, which directly or indirectly encloses an interior space, and an outer layer directly adjacent to the inner layer. The inner layer is based on fluoropolymer, and the outer layer consists of the following constituents: (A) 51-98% of a polyamide from the following group: PA 616, PA 516, PA 618 or mixtures thereof, and copolymers containing at least 50% of at least one of these polyamides and also mixtures...