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:
Jan. 18, 2011
Filed:
Nov. 09, 2004
Justin Ura, Livonia, MI (US);
Joseph Theis, Rockwood, MI (US);
Christian Goralski, Jr., St. Paul, MN (US);
Justin Ura, Livonia, MI (US);
Joseph Theis, Rockwood, MI (US);
Christian Goralski, Jr., St. Paul, MN (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
The present invention provides a thermally stable catalyst for treating automobile exhaust by-products is provided. The catalyst of the invention comprises a first section that includes a precious metal present in a first concentration and a second section that includes a precious metal present in a second concentration. The catalyst of the invention is characterized by a unique precious metal concentration profile in which the first concentration of the precious metal is lower than the second concentration of the precious metal. When placed with an automobile exhaust system, the second section is positioned downstream of the first section. The present invention also provides a lean NOtrap utilizing the unique precious metal concentration profile. The NOtrap is found to possess improved NOconversion performance relative to a NOtrap with the same total amount of precious metal deposited uniformly over the volume of the trap.