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. 02, 2002
Filed:
Mar. 17, 2000
Applicant:
Inventors:
Assignee:
Johnson Matthey Public Limited Company, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 8/00 ; B01J 2/302 ; B01J 2/304 ; B01J 2/342 ; C01B 2/120 ;
U.S. Cl.
CPC ...
B01J 8/00 ; B01J 2/302 ; B01J 2/304 ; B01J 2/342 ; C01B 2/120 ;
Abstract
A layered exhaust gas catalyst containing Pt in a first layer and Rb in a second layer is more selective for catalyzing the reaction between NO and/or nitrate with hydrocarbons and/or CO than for catalyzing the reaction between hydrocarbons and/or CO with oxygen. NO can be reduced to N under constant lean to stoichiometric conditions without the need for rich spikes.