ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,557, issued on May 20, was assigned to Johnson Matthey PLC (London).

"Compressed natural gas combustion and exhaust system" was invented by Hai-Ying Chen (Wayne, Pa.), Joseph Fedeyko (Wayne, Pa.), Jing Lu (Wayne, Pa.), Arthur Reining (Wayne, Pa.) and Agnes Raj (Reading, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a compressed natural gas combustion and exhaust system comprising: (i) a natural gas combustion engine and (ii) an exhaust treatment system comprising an intake for receiving an exhaust gas from the combustion engine and a catalyst article arranged to receive and treat the exhaust gas, where...