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:
May. 06, 2014
Filed:
Jan. 18, 2012
Masaaki Akamine, Hiroshima, JP;
Masahiko Shigetsu, Higashi-Hiroshima, JP;
Masaaki Akamine, Hiroshima, JP;
Masahiko Shigetsu, Higashi-Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An upper catalyst layer of an upstream catalystand a downstream catalystincludes an oxygen storage/release material in/on which a catalytic metal is included or loaded. The content of the oxygen storage/release material per 1 L of a substrate in the catalyst layer of the upstream catalystis larger than that in the catalyst layer of the downstream catalyst. The oxygen release amount per a unit amount of the Rh is larger than that for the upper catalyst layer of the upstream catalyst. At least part of the oxygen storage/release material included in the downstream catalyst shows a particle size distribution having a peak particle size smaller than that in the upstream catalyst