ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,551,877, issued on Feb. 17, was assigned to Mitsui Kinzoku Co. Ltd. (Tokyo).
"Exhaust gas purification catalyst" was invented by Tasuku Komanoya (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an exhaust gas purification catalyst that suppresses phosphorus poisoning and improves long-term durability. The exhaust gas purification catalyst includes a phosphorus collection layer and a catalyst layer containing at least one precious metal element Mp selected from the group consisting of Pt, Pd, and Rh, wherein the phosphorus collection layer is arranged on the upper layer side and/or the upstream side with respect to the catalyst ...