ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,553, issued on May 20, was assigned to Johnson Matthey PLC (London).
"Catalytic wall flow filter" was invented by Brenda Benet Rajkumar (Royston, Great Britain), Fezile Lakadamyali (Wayne, Pa.) and John Turner (Royson, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A catalytic wall-flow filter for exhaust gas from a gasoline engine is disclosed. The catalytic wall-flow filter comprises a wall-flow filter substrate having porous walls and a first face and a second face defining a longitudinal direction therebetween and first and second pluralities of channels extending in the longitudinal direction. The first plurality of channels is op...