US Patent Issued to Chevron U.S.A. on March 17 for "Polyanionic surfactants and methods of making and using thereof" (California Inventors)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,451, issued on March 17, was assigned to Chevron U.S.A. Inc. (San Ramon, Calif.).

"Polyanionic surfactants and methods of making and using thereof" was invented by Gayani W. Pinnawala (San Ramon, Calif.), Sujeewa S. Palayangoda (San Ramon, Calif.), Gregory A. Winslow (San Ramon, Calif.), Varadarajan Dwarakanath (San Ramon, Calif.), Kerry Kennedy Spilker (San Ramon, Calif.) and Robert George Shong (San Ramon, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making polyanionic surf...