Gas separation – With nonliquid cleaning means for separating media – With heating or cooling means
Reexamination Certificate
2007-12-04
2007-12-04
Greene, Jason M. (Department: 1724)
Gas separation
With nonliquid cleaning means for separating media
With heating or cooling means
C055S282200, C055S283000, C055S385300, C055S523000, C055S524000, C055SDIG010, C055SDIG030, C060S311000
Reexamination Certificate
active
10987173
ABSTRACT:
A diesel particulate filter including a microwave-absorbing target within a waveguide cavity. The cavity accepts microwave-frequency electromagnetic radiation through input couplers 90 degrees out of phase with each other to excite circular polarization heating modes. Through excitation of circularly polarized modes, heating patterns are time-averaged azimuthally to smooth out the hot and cold spots, thereby providing greater uniformity relative to heating patterns for corresponding linearly polarized modes.
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PCT International Search Report mailed Feb. 2, 2007.
Colburn Joseph S.
Gregoire Daniel J.
General Motors Corporation
Greene Jason M.
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