US Patent Issued to TORAY INDUSTRIES on Sept. 23 for "Biodegradable block copolymer" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,355, issued on Sept. 23, was assigned to TORAY INDUSTRIES Inc. (Tokyo).

"Biodegradable block copolymer" was invented by Taisuke Kogawa (Otsu, Japan), Masaki Fujita (Otsu, Japan), Yuichi Koyamatsu (Otsu, Japan), Kazuhiro Tanahashi (Otsu, Japan) and Kazuyuki Kidoba (Otsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A biodegradable block copolymer has high conformability and excellent degradability. The block copolymer including a polyalkylene glycol block and a polyhydroxyalkanoic acid block, wherein the mass ratio of the polyalkylene glycol block with respect to the total mass is 10 to 60%; the carbonyl carbon has a carbon nuclear relaxatio...