The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 2023
Filed:
Dec. 14, 2020
Norimichi Shimano, Toyota, JP;
Shogo Shirakawa, Toyota, JP;
Masahide Miura, Toyota, JP;
Isao Chinzei, Toyota, JP;
Seiji Nakahigashi, Toyota, JP;
Hiroki Nihashi, Kakegawa, JP;
Hiromi Togashi, Kakegawa, JP;
Tomomasa Aikawa, Kakegawa, JP;
Isao Naito, Kakegawa, JP;
Norimichi Shimano, Toyota, JP;
Shogo Shirakawa, Toyota, JP;
Masahide Miura, Toyota, JP;
Isao Chinzei, Toyota, JP;
Seiji Nakahigashi, Toyota, JP;
Hiroki Nihashi, Kakegawa, JP;
Hiromi Togashi, Kakegawa, JP;
Tomomasa Aikawa, Kakegawa, JP;
Isao Naito, Kakegawa, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
CATALER CORPORATION, Kakegawa, JP;
Abstract
The present disclosure provides an exhaust gas purification catalyst having improved durability, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the downstream portion contains Rh fine particles, and wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation σ of the particle size of 0.8 nm or less.