ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,482,831, issued on Nov. 25, was assigned to GRINM (Guangdong) Institute for Advanced Materials and Technology (Foshan, China).

"Nitrogen-doped graphitized carbon material and preparation method" was invented by Rongyue Wang (Foshan, China), Xuanxuan Bi (Jining, China) and Zhongwei Chen (Dalian, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A nitrogen-doped graphitized carbon material and a preparation method thereof are provided. The preparation method includes the following steps: adding graphitized carbon, pyrrole, concentrated hydrochloric acid and a non-noble metal ion compound into water sequentially in that order and mixing uniformly to obt...