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:
Dec. 04, 2007
Filed:
Nov. 12, 2004
Daniel J. Gregoire, Thousand Oaks, CA (US);
Weldon S. Williamson, Malibu, CA (US);
Kevin W. Kirby, Calabasas Hills, CA (US);
Amanda Phelps, Malibu, CA (US);
Daniel F. Sievenpiper, Santa Monica, CA (US);
Daniel J. Gregoire, Thousand Oaks, CA (US);
Weldon S. Williamson, Malibu, CA (US);
Kevin W. Kirby, Calabasas Hills, CA (US);
Amanda Phelps, Malibu, CA (US);
Daniel F. Sievenpiper, Santa Monica, CA (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A diesel particulate filter including a microwave-absorbing target housed within a waveguide cavity lined along the walls with a hard-electromagnetic surface (HES). The HES modifies specific electromagnetic boundary conditions for a given design frequency so as to enable the establishment of electromagnetic field patterns which are more uniform across the cavity thereby causing the target material to undergo enhanced uniformity heating. The heating of the microwave absorbing media causes particulate buildup to be vaporized and removed from the filter by the exhaust stream flow.