ALEXANDRIA, Va., March 5 -- United States Patent no. 12,240,961, issued on March 4, was assigned to DAICEL Corp. (Osaka, Japan).
"Cellulose acetate resin composition" was invented by Masaaki Kusumoto (Tokyo), Takafumi Kawasaki (Tokyo) and Akihiro Higuchi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The cellulose acetate resin composition may include: a cellulose acetate having a total degree of acetyl substitution of 1.9 or greater and 2.6 or less; and a plasticizer. The cellulose acetate may have a number average molecular weight of 45000 or greater and a weight average molecular weight of 70000 or greater. The plasticizer may be selected from (1) an ether-based plasticizer in which at least one te...