Electric heating – Microwave heating – Radiation protection
Reexamination Certificate
2007-11-27
2007-11-27
Leung, Philip H. (Department: 3742)
Electric heating
Microwave heating
Radiation protection
C219S739000, C219S743000, C174S374000, C174S388000
Reexamination Certificate
active
11267181
ABSTRACT:
A heating apparatus using an electromagnetic wave is disclosed, by which cut-of performance of an electromagnetic wave is enhanced by increasing an electromagnetic wave absorption bandwidth having cut-off performance below −70 dB. The present invention includes a door provided to an open front side of a body to be opened/closed, a choke filter having a panel type choke part arranged by at least one or more rows along an edge of the door and a filter part arranged by at least one or more rows along the choke and having a plurality of slots wherein a prescribed choke part is provided to a most inner side, a glass panel attached to an inner lateral side of the door and the choke filter, and a flange part provided to an external end portion of the door along the edge of the door to lie in a same level with an inner lateral side of the glass panel.
REFERENCES:
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patent: 4313044 (1982-01-01), Staats
patent: 4390767 (1983-06-01), Bucksbaum et al.
patent: 4471194 (1984-09-01), Hosokawa et al.
patent: 5036171 (1991-07-01), Kim et al.
patent: 52-3744 (1977-01-01), None
Hu Jin Yul
Kim Eung Su
Sim Sung Hun
Birch & Stewart Kolasch & Birch, LLP
Leung Philip H.
LG Electronics Inc.
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