ALEXANDRIA, Va., May 19 -- United States Patent no. 12,630,703, issued on May 19, was assigned to SNF GROUP (Andrezieux Boutheon, France).
"High molecular weight anionic polyacrylamides" was invented by Cedrick Favero (Andrezieux Boutheon, France), Johann Kieffer (Andrezieux Boutheon, France), Nicolas Boisse (Taixing City, China) and Jing Ling (Taixing City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "This invention relates to a polymer composition comprising a water-soluble anionic P2 polymer obtained by radical polymerization of at least one anionic monomer, in the presence of a water-soluble homopolymer P1 with a weight-average molecular weight of between 5,000 and 100,000 daltonssaid water-solub...