ALEXANDRIA, Va., March 12 -- United States Patent no. 12,246,296, issued on March 11, was assigned to Zhenhai Petrochemical Jianan Engineering Co. Ltd. (Ningbo, China).

"Depolymerization system having coil-wound heat exchanger" was invented by Jiang Tao (Ningbo, China), Xianan Zhang (Ningbo, China), Jianliang Wang (Ningbo, China), Xingmiao Hu (Ningbo, China), Li Wang (Ningbo, China), Lijun Wu (Ningbo, China) and Chenyang Huang (Ningbo, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A depolymerization system with a tube-wound heat exchanger (4) comprises a heat exchange device for heating a material, having a material output; a gas-liquid separation device (1) having an inlet and a gas output, connected...