ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,924, issued on Feb. 17, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).
"Fluororesin, multilayer product, and tube" was invented by Yuuki Kuwajima (Osaka, Japan) and Yukinori Kamiya (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fluororesin having a tensile strength retention ratio of 50% or more, the tensile strength retention ratio being calculated by the following formula from the tensile strength of the fluororesin after a heat treatment obtained by conducting a heat treatment at 130deg C. for 40,000 hours, and the tensile strength of the fluororesin before the heat treatment. Tensile strength retention ratio (%)=(tensile ...