US Patent Issued to Eastman Chemical on Feb. 4 for "Process for making novel polycondensation pre-polyesters, other copolyester precursors, and copolyesters" (Alabama, Tennessee Inventors)

ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,186, issued on Feb. 4, was assigned to Eastman Chemical Co. (Kingsport, Tenn.).

"Process for making novel polycondensation pre-polyesters, other copolyester precursors, and copolyesters" was invented by Robert Jacks Sharpe (Madison, Ala.) and Emmett Dudley Crawford (Kingsport, Tenn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process for making a polycondensation pre-polyester, a polyester or both, comprising the following steps: following steps: A. Acylation of at least one diacid chloride with at least one alcohol to form at least one diester; B. Partial hydrolysis of the diester product of Step A to form at least one monoacid; C. Esterifying ...