ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,710, issued on Oct. 28, was assigned to BIOME BIOPLASTICS Ltd. (Southampton, Great Britain).

"Process for the preparation of 2,4- or 2,5-pyridinedicarboxylic acid and copolymers derived therefrom" was invented by Paul Law (Southampton, Great Britain), Paul Mines (Southampton, Great Britain) and Timothy Bugg (Coventry, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to processes for the formation of pyridinedicarboxylic acid (PDCA), in particular, 2,4-pyridinedicarboxylic acid (2,4-PDCA) and 2,5-pyridinedicarboxylic acid (2,5-PDCA), and mono- and diester derivatives thereof, from 3,4-dihydroxybenzoic acid, v...