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:
May. 28, 2002
Filed:
Feb. 24, 2000
Applicant:
Inventors:
Martin Hartweg, Erbach, DE;
Thomas Fetzer, Speyer, DE;
Bernd Morsbach, Ludwigshafen, DE;
Otto Kumberger, Mannheim, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 8/00 ; B01J 2/906 ; B01J 2/302 ; B01D 4/700 ; C01B 2/100 ;
U.S. Cl.
CPC ...
B01J 8/00 ; B01J 2/906 ; B01J 2/302 ; B01D 4/700 ; C01B 2/100 ;
Abstract
A storage catalyst includes (1) a component that has a catalytic reducing action for nitrogen oxides at least in the presence of hydrocarbons, and (2) a component that stores NOx at least at temperatures of below 100° C. The catalytically active component is of the general chemical formula A B O , where A is one or more divalent metals and B is one or more trivalent metals, and where a+b≦3 and a, b>0. The reaction enthalpy or the chemical activity between the catalytically active component and the NOx-storing component is low at least up to temperatures of 600° C.