ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,564, issued on March 18, was assigned to Shin-Etsu Chemical Co. Ltd. (Tokyo).
"Method for producing vinyl chloride type polymer" was invented by Hiroshi Fukudome (Kamisu, Japan), Kazuhiro Kumakura (Kamisu, Japan) and Toshihiko Kawakubo (Kamisu, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing a vinyl chloride type polymer is to produce the vinyl chloride type polymer by polymerizing a vinyl chloride monomer, or a mixture of a vinyl chloride monomer with a monomer copolymerizable with the vinyl chloride monomer in an aqueous medium by using a polymerization reactor. An aqueous solution of a copolymerized polyether having a...