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:
Jun. 13, 2017
Filed:
Dec. 09, 2014
Cataler Corporation, Kakegawa-shi, Shizuoka, JP;
Satoshi Matsueda, Kakegawa, JP;
Akimasa Hirai, Kakegawa, JP;
Kenichi Taki, Kakegawa, JP;
Sho Hoshino, Kakegawa, JP;
CATALER CORPORATION, Shizuoka, JP;
Abstract
Provided is an exhaust cleaning 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 including a substrate and a catalyst coating layer including 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. In a bottom coating layer near substrate, the CeOcontent in a bottom layer's downstream portion is less than the CeOcontent in a bottom coating layer's upstream portion.