ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,398,041, issued on Aug. 26, was assigned to TONGJI UNIVERSITY (Shanghai).

"Method and device for preparing graphene and hydrogen gas by converting waste plastics with joule heat" was invented by Ying Wang (Shanghai) and Yilong Yan (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and a device for preparing graphene and hydrogen gas by converting waste plastics with Joule heat are provided according to the present application. The method uses the Joule heat generated when a strong current passes through the mixed plastic material mixed with conductive additive, as the reaction driving energy. By Joule heating, carbon-carbon bonds and carb...