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:
Dec. 22, 1998
Filed:
May. 09, 1996
Applicant:
Inventors:
Bernd Krutzsch, Denkendorf, DE;
Andrea Seibold, Blaustein-Arnegg, DE;
Leonhard Walz, Neu-Ulm, DE;
Walter Boegner, Remseck, DE;
Martina Heinau, Ulm, DE;
Martin Hartweg, Erbach, DE;
Brigitte Konrad, Kornwestheim, DE;
Assignee:
Daimler-Benz AG, Stuttgart, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
4232132 ; 4232391 ;
Abstract
A material and a process for adsorbing and desorbing nitrogen oxides in exhaust gas systems of engines running on a lean mixture, which does not require a prior oxidation step, wherein a mixed oxide which has an oxygen-rich orthorhombic structure is used which changes to an oxygen-poor tetragonal structure as a function of temperature.