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:
May. 13, 2008
Filed:
Dec. 17, 2002
Toshihiro Tachikawa, Yokohama, JP;
Junichi Miyahara, Yokohama, JP;
Toshihiko Hanamachi, Yokohama, JP;
Toshihiro Tachikawa, Yokohama, JP;
Junichi Miyahara, Yokohama, JP;
Toshihiko Hanamachi, Yokohama, JP;
NHK Spring Co., Ltd., Tokohama-shi, JP;
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.