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:
Sep. 03, 2013
Filed:
May. 11, 2012
Gerd Grubert, Hannover, DE;
Alfred Punke, Walle, DE;
Torsten Neubauer, Langenhagen, DE;
Ruediger Wolff, Nienburg, DE;
Stanley Roth, Yardley, PA (US);
Yuejin LI, Edison, NJ (US);
Torsten Müller-stach, Hannover, DE;
Marcus Hilgendorff, Hannover, DE;
Gerd Grubert, Hannover, DE;
Alfred Punke, Walle, DE;
Torsten Neubauer, Langenhagen, DE;
Ruediger Wolff, Nienburg, DE;
Stanley Roth, Yardley, PA (US);
Yuejin Li, Edison, NJ (US);
Torsten Müller-Stach, Hannover, DE;
Marcus Hilgendorff, Hannover, DE;
BASF SE, Ludwigshafen, DE;
BASF Corporation, Florham Park, NJ (US);
Abstract
Disclosed is a catalyzed soot filter with layered design wherein the first coating of the filter comprises an oxidation catalyst comprising platinum (Pt) and optionally palladium (Pd), wherein the second coating of the filter comprises an oxidation catalyst comprising Pd and optionally Pt, wherein the Pt concentration in the second coating is lower than the Pt concentration in the first coating, and wherein the weight ratio of Pt:Pd in the second coating is in the range of from 1:1 to 0:1; and wherein the first coating and the second coating are present on the wall flow substrate at a coating loading ratio in the range of from 0.25 to 3, calculated as ratio of the loading of the first coating (in g/inch(g/(2.54 cm))): loading of the second coating (in g/inch(g/(2.54 cm))).