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:
Feb. 22, 2005
Filed:
Nov. 27, 2002
Lutz Marc Ruwisch, Darmstadt, DE;
Ulrich Göbel, Hattersheim, DE;
Juliane Theis, Karlstein, DE;
Rainer Domesle, Alzenau-Kälberau, DE;
Lutz Marc Ruwisch, Darmstadt, DE;
Ulrich Göbel, Hattersheim, DE;
Juliane Theis, Karlstein, DE;
Rainer Domesle, Alzenau-Kälberau, DE;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
The invention relates to a catalyst for lowering the amount of NOin the lean exhaust gas from lean burn engines, comprising active aluminum oxide, magnesium oxide and at least one noble metal of the platinum group of the periodic table of the elements, as well as at least one nitrogen oxide storage material. The catalyst is characterized in that the magnesium oxide forms a homogeneous mixed oxide with aluminum oxide and is present in a concentration of about 1 to about 40 wt.-%, based on the total weight of the mixed oxide.