ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,380, issued on Sept. 23, was assigned to OSAKA SODA Co. LTD. (Osaka, Japan).
"Acrylic copolymer and rubber material" was invented by Ryo Okada (Osaka, Japan), Shinichi Udo (Osaka, Japan), Motoki Kitagawa (Osaka, Japan) and Masatsugu Naitou (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "It is an object of the present invention to provide an acrylic copolymer for providing a highly heat-resistant rubber material that shows a small rate of change in strength without loss of elongation, even under a high-temperature condition over a long period, and a composition containing the acrylic copolymer. The present invention provides an acrylic ...