US Patent Issued to ARAKAWA CHEMICAL INDUSTRIES on Oct. 21 for "Paper-strengthening agent, paper, and method of producing paper" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,734, issued on Oct. 21, was assigned to ARAKAWA CHEMICAL INDUSTRIES LTD. (Osaka, Japan).

"Paper-strengthening agent, paper, and method of producing paper" was invented by Makoto Kobayashi (Osaka, Japan), Teruaki Sato (Osaka, Japan) and Tetsu Mizuko (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A paper-strengthening agent comprising an amphoteric (meth)acrylamide polymer and an amphoteric (meth)acrylamide polymer, wherein each of constituent monomers of the amphoteric (meth)acrylamide polymer and the amphoteric (meth)acrylamide polymer comprises (meth)acrylamide, a cationic unsaturated monomer, an anionic unsaturated monomer, and a cro...