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:
Jun. 18, 2019
Filed:
Mar. 24, 2016
Hiromasa Suzuki, Toyota, JP;
Masahide Miura, Toyota, JP;
Yoshinori Saito, Kakegawa, JP;
Satoru Katoh, Nagakute, JP;
Toshitaka Tanabe, Nagakute, JP;
Tetsuhiro Hirao, Toyota, JP;
Tatsuya Ohashi, Kakegawa, JP;
Hiroaki Naito, Kikugawa, JP;
Hirotaka Ori, Kakegawa, JP;
Michihiko Takeuchi, Kakegawa, JP;
Keiichi Narita, Kakegawa, JP;
Hiromasa Suzuki, Toyota, JP;
Masahide Miura, Toyota, JP;
Yoshinori Saito, Kakegawa, JP;
Satoru Katoh, Nagakute, JP;
Toshitaka Tanabe, Nagakute, JP;
Tetsuhiro Hirao, Toyota, JP;
Tatsuya Ohashi, Kakegawa, JP;
Hiroaki Naito, Kikugawa, JP;
Hirotaka Ori, Kakegawa, JP;
Michihiko Takeuchi, Kakegawa, JP;
Keiichi Narita, Kakegawa, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi, JP;
CATALER CORPORATION, Kakegawa-shi, Shizuoka, JP;
Abstract
The present invention is directed to address the following problem: in an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst, reduction in the gas diffusivity of the underfloor catalyst results in reduction in the use efficiency of a catalytic active site, resulting in reduction in purification performance. The present invention relates to an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst having a catalyst coating where a large number of voids are included, wherein high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain rate or more of the whole volume of the voids, to thereby enhance the purification performance of the catalyst.