ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,723,152, issued on Sept. 1, was assigned to BYK-Chemie GmbH (Wesel, Germany).
"Composition comprising a comb copolymer" was invented by Robin Von Hagen (Dusseldorf, Germany), Megumu Takai (Miki, Japan), Andreas Okkel (Wesel, Germany), Hiroshi Yonehara (Nishinomiya, Japan), Benjamin Lindner (Rudenhausen, Germany) and Yu Sugioka (Akashi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a composition comprising a) a polymer a) comprising polymerized units of a N-vinyl lactam, b) a comb copolymer b) having a polymer backbone based on a vinyl aromatic compound and an ethylenically unsaturated polymerizable carboxylic anhydride, a...