ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,398,239, issued on Aug. 26, was assigned to COLORADO STATE UNIVERSITY RESEARCH FOUNDATION (Fort Collins, Colo.).

"Pan-tactic crystalline and recyclable polythioesters" was invented by Eugene Y. Chen (Fort Collins, Colo.) and Changxia Shi (Fort Collins, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A monomer design strategy based on a bridged bicyclic thiolactone that produces stereo-disordered to perfectly stereo-ordered polythioesters is disclosed. The described polythioesters exhibit high crystallinity and full chemical recyclability. Such polymers possess intrinsic tacticity-independent crystallinity and chemical recyclability, tunable tactici...