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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 7749472 B1

PDFFull Text
Date of Patent:
Jul. 06, 2010

Filed:

Aug. 14, 2006

Phosgard, a new way to improve poison resistance in three-way catalyst applications

Applicants:

Shau-lin Franklin Chen, Piscataway, NJ (US);

Knut Wassermann, Princeton, NJ (US);

Jin Sakakibara, Edison, NJ (US);

Inventors:

Shau-Lin Franklin Chen, Piscataway, NJ (US);

Knut Wassermann, Princeton, NJ (US);

Jin Sakakibara, Edison, NJ (US);

Assignee:

BASF Corporation, Florham Park, NJ (US);

Attorneys:

Bronwen M. Loeb

Drinker Biddle & Reath

Primary Examiner:

Cam N Nguyen

Int. Cl.
CPC ...
B01J 23/00 (2006.01); B01J 8/02 (2006.01); B01D 53/56 (2006.01); B01D 53/94 (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

The present invention provides for novel poisoning-resistant catalysts used for automobile exhaust gas treatment systems. To alleviate the detrimental affects of engine oil and/or fuel additive poisoning the present invention provides for an overcoat layer comprising a porous refractory oxide and one or more base metal oxides, which is coated over one or more precious metal containing washcoat layers. The overcoat of the present invention prevents phosphorous as well as other poisoning deposits, from fouling and/or negatively interacting with the underlying precious metal containing washcoats. In an alternative embodiment, the present invention provides for the coating of the upstream end of a catalytic member by the overcoat layer, thereby creating an upstream poison capture zone.

Find Patent Forward Citations

Chen, Shau-Lin. (2010). Phosgard, a new way to improve poison resistance in three-way catalyst applications (U.S. Patent No. 7749472). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7749472

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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