Patent 9643161 was granted and assigned to Johnson Matthey on May, 2017 by the United States Patent and Trademark Office.
An oxidation catalyst for treating an exhaust gas from a compression ignition engine, which oxidation catalyst comprises: a substrate; a first washcoat region comprising palladium (Pd) and a first support material comprising cerium oxide; and a second washcoat region comprising platinum (Pt) and a second support material.