US Patent Issued to MITSUBISHI GAS CHEMICAL on July 14 for "Polyester resin" (Japanese Inventors)

ALEXANDRIA, Va., July 14 -- United States Patent no. 12,679,929, issued on July 14, was assigned to MITSUBISHI GAS CHEMICAL COMPANY INC. (Tokyo).

"Polyester resin" was invented by Takami Morishita (Kanagawa, Japan), Masayuki Nagai (Kanagawa, Japan) and Makoto Toyohara (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polyester resin including dicarboxylic acid constituent units and diol constituent units, wherein the diol constituent units include a constituent unit A1 derived from a diol having a cyclic acetal skeleton and a constituent unit A2 derived from 2,2,4,4-tetramethoxy-1,3-cyclobutanediol, and wherein the dicarboxylic acid constituent units include a constituent unit B1 derived from 2,6-napht...