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:
Mar. 11, 2008
Filed:
Nov. 10, 2004
Hideharu Iwakuni, Hiroshima, JP;
Masaaki Akamine, Hiroshima, JP;
Seiji Miyoshi, Hiroshima, JP;
Hiroshi Yamada, Hiroshima, JP;
Akihide Takami, Hiroshima, JP;
Yuki Murakami, Hiroshima, JP;
Hideharu Iwakuni, Hiroshima, JP;
Masaaki Akamine, Hiroshima, JP;
Seiji Miyoshi, Hiroshima, JP;
Hiroshi Yamada, Hiroshima, JP;
Akihide Takami, Hiroshima, JP;
Yuki Murakami, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
The present invention relates to an exhaust gas purification catalytic material containing: (a) a mixed oxide containing Ce and Zr for storing and releasing oxygen; and (b) a precious metal catalyst made of one or more kinds of precious metals. The precious metal catalyst comprises a first precious metal catalyst component placed between atoms, at crystal lattice points and/or at oxygen defect sites of the mixed oxide and a second precious metal catalyst component loaded on the surface of the mixed oxide, thereby improving the thermal resistance, oxygen storage capacity and exhaust gas conversion performance of the catalytic material.