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:
Jul. 26, 2011
Filed:
Sep. 28, 2004
Jeffrey D. Jordan, Williamsburg, VA (US);
David R. Schryer, Hampton, VA (US);
Patricia P. Davis, Yorktown, VA (US);
Bradley D. Leighty, Gloucester, VA (US);
Anthony N. Watkins, Hampton, VA (US);
Jacqueline L. Schryer, Hampton, VA (US);
Donald M. Oglesby, Virginia Beach, VA (US);
Suresh T. Gulati, Elmira, NY (US);
Jerry C. Summers, Charleston, WV (US);
Jeffrey D. Jordan, Williamsburg, VA (US);
David R. Schryer, Hampton, VA (US);
Patricia P. Davis, Yorktown, VA (US);
Bradley D. Leighty, Gloucester, VA (US);
Anthony N. Watkins, Hampton, VA (US);
Jacqueline L. Schryer, Hampton, VA (US);
Donald M. Oglesby, Virginia Beach, VA (US);
Suresh T. Gulati, Elmira, NY (US);
Jerry C. Summers, Charleston, WV (US);
Abstract
The invention described herein involves a novel approach to the production of oxidation/reduction catalytic systems. The present invention serves to stabilize the tin oxide reducible metal-oxide coating by co-incorporating at least another metal-oxide species, such as zirconium. In one embodiment, a third metal-oxide species is incorporated, selected from the group consisting of cerium, lanthanum, hafnium, and ruthenium. The incorporation of the additional metal oxide components serves to stabilize the active tin-oxide layer in the catalytic process during high-temperature operation in a reducing environment (e.g., automobile exhaust). Moreover, the additional metal oxides are active components due to their oxygen-retention capabilities. Together, these features provide a mechanism to extend the range of operation of the tin-oxide-based catalyst system for automotive applications, while maintaining the existing advantages.