ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,815, issued on May 5, was assigned to The Hong Kong University of Science and Technology (Hong Kong).

"Atmospheric aerosol inorganic and organic nitrogen quantification method and system" was invented by Jianzhen Yu (Hong Kong), Xu Yu (Hong Kong), Jinjian Li (Hong Kong), Qianfeng Li (Riverside, Calif.) and Xiaohui Huang (Hong Kong).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of atmospheric inorganic and organic nitrogen quantification is disclosed. The ambient air is sampled by drawing it through an inlet followed by a denuder to reduce positive artifacts. After artifact removal, the air sample is collected onto a filter. The filter is subj...