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:
Jul. 04, 2017
Filed:
Dec. 09, 2014
Cataler Corporation, Kakegawa-shi, Shizuoka, JP;
Sho Hoshino, Kakegawa, JP;
Akimasa Hirai, Kakegawa, JP;
Kenichi Taki, Kakegawa, JP;
Satoshi Matsueda, Kakegawa, JP;
CATALER CORPORATION, Kakegawa-shi, JP;
Abstract
Provided is an exhaust catalyst that exhibits higher NO-reducing activities at the time of engine restart while maintaining its catalytic activities during normal traveling. This invention provides an exhaust cleaning catalyst comprising a substrate and a catalyst coating layer that includes CeO. Catalyst coating layer is constituted in its thickness direction with multiple coating layers. In a top coating layer located at the outermost surface, the CeOcontent in a top coating layer's upstream portion is less than the CeOcontent in a top coating layer's downstream portion; and the CeOcontent in the top coating layer's upstream portion is less than the CeOcontent in a lower coating layer. The CeOcontent per liter of catalyst volume in the entire coating layer is 10 g/L to 30 g/L.