ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,881, issued on Sept. 23, was assigned to SAUDI ARABIAN OIL COMPANY (Dhahran, Saudi Arabia).

"System and method for reducing internal combustion engine emissions" was invented by Emmanuel Laigle (Courbevoie, France), Christophe Chaillou (Rueil-Malmaison, France) and Caroline Norsic (Rueil-Malmaison, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for reducing internal combustion engine emissions. The system includes an exhaust line for feeding an exhaust from an internal combustion engine to a catalytic converter and a particulate filter to produce a filtered exhaust. The system further includes a filter effluent line to feed this fil...