ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,618, issued on Aug. 19, was assigned to YUNNAN HUAPU QUANTUM MATERIAL Co. LTD (Yunnan, China), ROI OPTOELECTRONICS TECHNOLOGY CO LTD. (Shanghai), CHONGQING INSTITUTE OF EAST CHINA NORMAL UNIVERSITY (Chongqing, China) and EAST CHINA NORMAL UNIVERSITY (Shanghai).

"Method for preparing infrared radiation ceramic material" was invented by Heping Zeng (Chongqing, China), Mengyun Hu (Chongqing, China) and Shencheng Shi (Chongqing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for preparing an infrared radiation ceramic material includes mixing and ball milling raw materials of Fe2O3, MnO2 and CuO in a mass ratio to obtain a mixed powder; p...