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:
Apr. 14, 2015
Filed:
Sep. 28, 2009
Yoshiyuki Michiaki, Okayama, JP;
Yoshichika Horikawa, Okayama, JP;
Yoshiyuki Michiaki, Okayama, JP;
Yoshichika Horikawa, Okayama, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Abstract
A composite oxide for an exhaust gas purification catalyst is provided which can burn PM in diesel engine exhaust gas at low temperatures and has a good S desorption property. The composite oxide for an exhaust gas purification catalyst is composed of Ce, Bi, Pr, R, and oxygen in a molar ratio of Ce:Bi:Pr:R=(1−x−y−z):x:y:z. The ratios of Ce, Bi, Pr, and R satisfy 0<x+y+z≦0.5 and preferably 0<x≦0.1, 0<y≦0.25, and 0<z≦0.3. Particularly, when R is Zr, the composite oxide exhibits a good S desorption property at a temperature of about 600° C. and can recover its catalytic activity at low temperatures. Therefore, the exhaust gas purification catalyst is suitable as a PM combustion catalyst.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile