US Patent Issued to Bridgestone on July 28 for "Extraction of guayule resin" (Ohio Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,691,391, issued on July 28, was assigned to Bridgestone Corp. (Chuo-ku, Japan).

"Extraction of guayule resin" was invented by Mark N. DeDecker (North Canton, Ohio) and Christian Andrews (Kent, Ohio).

According to the abstract* released by the U.S. Patent & Trademark Office: "In various embodiments, methods for extracting various constituents from Parthenium argentatum resin are disclosed. The methods begin with a nonpolar resin solution that is manipulated by polar solvent and water additions to precipitate low MW isoprene rubber and form separable aqueous polar and nonpolar liquid fractions, wherein the aqueous polar liquid fraction is rich in argentatins and the nonpolar liquid fra...