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. 20, 2000
Filed:
Dec. 16, 1998
Applicant:
Inventors:
Harald Klein, Bessenbach, DE;
Hans Van Den Tillaart, Freigericht, DE;
Egbert Lox, Hanau, DE;
Thomas Kreuzer, Karben, DE;
Stephan Eckhoff, Wunstorf, DE;
Assignee:
Degussa-Huls Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; B01J / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
4232135 ; 502334 ; 502349 ; 502500 ;
Abstract
An oxidation catalyst for internal combustion engines which contains platinum on a finely divided support material and containing lead as a promoter. The catalytic activity of the oxidation catalyst can be increased greatly by promoting the catalyst with lead at a molar ratio of lead to platinum of 2:1. The light-off temperatures of the promoted catalyst are well below the corresponding temperatures for a conventional, lead-free catalyst.