ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,648, issued on June 30, was assigned to SNF Group (Andrezieux Boutheon, France).
"Polymer of 2-acrylamido-2-methylpropane sulphonic acid and use thereof" was invented by Cedrick Favero (Andrezieux Boutheon, France) and Johann Kieffer (Andrezieux Boutheon, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A water-soluble polymer has weight-average molecular weight greater than 10 million daltons. This polymer is obtained from 2-acrylamido-2-methylpropane sulfonic acid and/or one of its salts at least partially of renewable and non-fossil origin. The polymer can be used in the field of enhanced oil and gas recovery or in the treatment of tailings ...