ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,899, issued on Sept. 16, was assigned to LEVITEX FOAMS Ltd. (Altrincham, Great Britain).
"Polyurethane foam" was invented by Jianfeng Wang (Haining, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A polyurethane foam is disclosed having unique load bearing characteristics rendering it suitable for a variety of applications. The foam exhibits high surface-softness and smoothness properties, making it well-suited for use in articles such as pillows and mattress toppers. However, upon continued application of pressure, the resilience of the foam increases sharply, translating into a remarkable support characteristics that make the foam suitable f...