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:
Sep. 29, 2026
Filed:
May. 16, 2023
Takahiro Nishio, Miyoshi, JP;
Shogo Shirakawa, Toyota, JP;
Hiroki Shirakawa, Toyota, JP;
Nobuyuki Takagi, Toyota, JP;
Tomomasa Aikawa, Fukuroi, JP;
Hiroki Nihashi, Hamamatsu, JP;
Takahiro Noguchi, Hamamatsu, JP;
Takahiro Nishio, Miyoshi, JP;
Shogo Shirakawa, Toyota, JP;
Hiroki Shirakawa, Toyota, JP;
Nobuyuki Takagi, Toyota, JP;
Tomomasa Aikawa, Fukuroi, JP;
Hiroki Nihashi, Hamamatsu, JP;
Takahiro Noguchi, Hamamatsu, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
CATALER CORPORATION, Kakegawa, JP;
Abstract
The exhaust gas purification device includes: a substrate including an upstream and a downstream ends; a first catalyst layer extending across a first region and containing a first rhodium-containing catalyst and a first cerium-containing oxide, the first rhodium-containing catalyst containing a first metal oxide carrier and first rhodium particles supported on the first metal oxide carrier, a mean of a particle size distribution of the first rhodium particles being 1.5 nm to 18 nm; and a second catalyst layer extending across a second region and containing a second rhodium-containing catalyst containing a second metal oxide carrier and second rhodium particles supported on the second metal oxide carrier, a cerium content in the first catalyst layer based on a volume capacity of the substrate in the first region being higher than a cerium content in the second catalyst layer based on a volume capacity of the substrate in the second region.