ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,186, issued on Feb. 17, was assigned to SNF Group (Andrezieux Boutheon, France).
"Process for manufacturing paper or cardboard" was invented by Cyril Barriere (Andrezieux Boutheon, France) and Bastien Martel (Andrezieux Boutheon, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process for making a sheet of paper or cardboard from a fiber suspension, includes injection of a polymer P3 into a cellulosic fiber suspension, formation of a sheet of paper or cardboard, and drying of the sheet of paper or cardboard. The P3 polymer is prepared, prior to the injection, from a water-soluble P1 polymer of at least one nonionic monomer, such as acrylamid...