US Patent Issued to BASF on Oct. 28 for "Viscosity index improver for lubricants based on polyisobutylenephenyl acrylate comb copolymers" (German Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,657, issued on Oct. 28, was assigned to BASF SE (Ludwigshafen am Rhein, Germany).

"Viscosity index improver for lubricants based on polyisobutylenephenyl acrylate comb copolymers" was invented by Ivette Garcia Castro (Ludwigshafen am Rhein, Germany), Rene Koschabek (Ludwigshafen am Rhein, Germany), Andrea Misske (Ludwigshafen am Rhein, Germany) and Christoph Fleckenstein (Ludwigshafen am Rhein, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a comb copolymer comprising in polymerized form a PIB macromonomer of the formula (I) and an acrylate monomer of the formula (II). The invention further relates to a metho...