Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
2008-05-13
2008-05-13
Paik, Sang (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
C219S444100
Reexamination Certificate
active
07372001
ABSTRACT:
A ceramics heater comprises a circular heater plate formed of aluminum nitride and a metal foil heater wire formed of a high-melting metal and having a thickness of 100 μm to 175 μm. The heater wire is embedded in the heater plate. The heater wire has an inside portion located near the center of the heater plate and formed in zigzags at first pitches in the circumferential direction of the heater plate and an outside portion located near the outer periphery of the heater plate and formed in zigzags at second pitches in the circumferential direction of the heater plate. The second pitches are shorter than the first pitches.
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Office Action dated Oct. 29, 2004 from corresponding Korean Application.
Hanamachi Toshihiko
Miyahara Junichi
Tachikawa Toshihiro
NHK Spring Co. Ltd.
Ohlandt Greeley Ruggiero & Perle L.L.P.
Paik Sang
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