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. 25, 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
A Rh-including catalyst layer of an upstream catalystincludes Rh-doped CeZr-based mixed oxide and Rh-loading CeZr-based mixed oxide as oxygen storage/release materials. A Rh-including catalyst layer of a downstream catalystincludes only Rh-doped CeZr-based mixed oxide as an oxygen storage/release material. The content of the oxygen storage/release materials included in the Rh-including catalyst layer of the upstream catalystis smaller than that of the downstream catalyst. The Rh-doped CeZr-based mixed oxide of the upstream catalystshows a particle size distribution having a peak particle size smaller than that of the Rh-doped CeZr-based mixed oxide of the downstream catalyst