US Patent Issued to Eastman Chemical on Aug. 11 for "Regioselectively substituted cellulose ester based negative birefringent compensation films having improved wavelength dispersion" (Tennessee, Alabama, Indiana Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,703,774, issued on Aug. 11, was assigned to Eastman Chemical Co. (Kingsport, Tenn.).

"Regioselectively substituted cellulose ester based negative birefringent compensation films having improved wavelength dispersion" was invented by Qianqian Zhang (Kingsport, Tenn.), Charles Michael Buchanan (Bluff City, Tenn.), Casey Lynn Elkins (Kingsport, Tenn.), Wesley Wayne McConnell (Gray, Tenn.), Bin Wang (Kingsport, Tenn.), Robert Jacks Sharpe (Madison, Ala.) and Mustafa Humbel Ahmed (Lafayette, Ind.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application discloses stretched films comprising regioselectively substituted cellulose esters and a comp...