US Patent Issued to Johnson Matthey, GM Global Technology Operations on Sept. 2 for "Exhaust gas treatment system" (Pennsylvania, Michigan Inventors)

ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,403,425, issued on Sept. 2, was assigned to Johnson Matthey PLC (London) and GM Global Technology Operations LLC.

"Exhaust gas treatment system" was invented by Ceren Aydin (Audubon, Pa.), Patrick Bannon (Wayne, Pa.), Penelope Markatou (Audubon, Pa.), Dennis Murray (Wayne, Pa.), Rahul Mital (Detroit) and Eric Darvin Thomas (Detroit).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and systems related to an exhaust gas treatment system including, in order: (i) a first means for injecting a nitrogenous reductant; (ii) a first selective catalytic reduction (SCR) catalyst; (iii) an ammonia slip catalyst (ASC); and (iv) a second selective catalytic redu...