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. 27, 1995
Filed:
Feb. 23, 1994
Applicant:
Inventors:
Hiroyuki Kanesaka, Yokohama, JP;
Naoki Kachi, Yokosuka, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
502 66 ; 4232135 ; 4232392 ; 502 74 ;
Abstract
A catalyst for the purification of exhaust gas comprises a first coating layer of activated alumina containing at least one of Pt, Pd and Rh, a second coating layer of activated alumina containing no noble metal and a third coating layer of zeolite ion-exchanged with Cu or Co and develops excellent purification performance in lean-burn atmosphere after engine aging treatment.