ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,782,327, issued on Nov. 3, was assigned to PetroChina Co. Ltd. (Beijing City, China).

"Method and system for flame photometric online detection of sulfur-containing compound content in natural gas" was invented by Lin Shen (Beijing City, China), Xiaoqin Wang (Beijing City, China), Li Zhou (Beijing City, China), Xiaohong Li (Beijing City, China), Ling Huang (Beijing City, China) and Zhenghua Chen (Beijing City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a system for on-line flame photometric detection of the content of sulfur-containing compounds in natural gas. The system comprises a sampling device, a depressuriz...