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. 02, 2015
Filed:
Sep. 21, 2012
Basf SE, Ludwigshafen, DE;
Basf Corporation, Florham Park, NJ (US);
Gerd Grubert, Hannover, DE;
Torsten Neubauer, Langenhagen, DE;
Alfred Punke, Walle, DE;
Marcus Hilgendorff, Hannover, DE;
Torsten Müller-Stach, Hannover, DE;
Olga Gerlach, Ludwigshafen, DE;
Xinyi Wei, Princeton, NJ (US);
Jeffrey Hoke, North Brunswick, NJ (US);
Shiang Sung, New York, NY (US);
Stanley Roth, Yardley, PA (US);
BASF SE, Ludwigshafen, DE;
BASF CORPORATION, Florham Park, NJ (US);
Abstract
The present invention relates to a layered diesel oxidation catalyst (DOC) comprising: a) a carrier substrate; b) a diesel oxidation catalytic material comprising b1) a first layer located on the carrier substrate, the first layer comprising palladium impregnated on a support material comprising ceria in an amount of at least 45 weight-% based on the total weight of the support material, and optionally comprising platinum; b2) a second layer located on the first layer, the second layer comprising palladium and platinum each impregnated on a support material comprising a metal oxide; wherein the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.