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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.:

US 7928032 B1

PDFFull Text
Date of Patent:
Apr. 19, 2011

Filed:

Dec. 18, 2008

Catalyzed soot filter and method(s) to make these

Applicants:

Robin Ziebarth, Midland, MI (US);

Robert T. Nilsson, Midland, MI (US);

Steven J. Martin, Midland, MI (US);

Inventors:

Robin Ziebarth, Midland, MI (US);

Robert T. Nilsson, Midland, MI (US);

Steven J. Martin, Midland, MI (US);

Assignee:

Dow Global Technologies LLC, Midland, MI (US);

Attorney:
Primary Examiner:

Patricia L Hailey

Int. Cl.
CPC ...
B01J 27/224 (2006.01); B01J 8/02 (2006.01); B01D 39/00 (2006.01); B01D 50/00 (2006.01); B01D 59/50 (2006.01); B01D 39/06 (2006.01); B01D 39/20 (2006.01); B01D 46/00 (2006.01); B01D 53/56 (2006.01); B01D 53/94 (2006.01); F01N 3/00 (2006.01); F01N 3/10 (2006.01); F01N 3/02 (2006.01); C01B 21/00 (2006.01); C01B 23/00 (2006.01); C01B 25/00 (2006.01); C01B 31/00 (2006.01); C01B 33/00 (2006.01); C01B 35/00 (2006.01); C01G 28/00 (2006.01); C01G 30/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

An improved soot catalyst is comprised of an alkali compound at least partially coated by a ceramic coating comprised of C bonded to a metal, semimetallic element or combination thereof. The improved soot catalyst may be employed in catalyzed Diesel particulate filters. In one method to make a catalyzed Diesel particulate filter, the improved filter is made by contacting a porous ceramic body having an alkali catalyst thereon, coating the alkali catalyst with an organic ceramic precursor, heating the ceramic body to a temperature in an atmosphere sufficient to decompose the organic ceramic precursor to form the soot catalyst on the porous ceramic body without volatilizing substantial amount of the alkali catalyst away.

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