ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,657, issued on Dec. 9, was assigned to Purem GmbH (Neunkirchen, Germany).
"Exhaust gas system for an internal combustion engine" was invented by Peter Kast (Esslingen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An exhaust gas system for an internal combustion engine includes an exhaust gas treatment unit, an exhaust gas guide conducting exhaust gas to the exhaust gas treatment unit and a reactant discharge unit for the discharge of reactant into the exhaust gas guide. The exhaust gas guide includes an outer pipe and an inner pipe in a longitudinal region between the reactant discharge unit and the exhaust gas treatment unit. An external v...