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:
Nov. 02, 2004
Filed:
Oct. 21, 2002
Applicant:
Inventor:
Shinji Yamaguchi, Ama-Gun, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/68 ;
U.S. Cl.
CPC ...
H05B 3/68 ;
Abstract
A ceramic heater is provided, including a ceramic substrate with a heating face and a heat generator so that the temperature on the heating face may be controlled without a temperature controlling member that is separate from the substrate. The surface of the ceramic substrate includes a heating face, a first region provided apart from the heating face and a second region provided apart from the heating face. The second region has a lower emissivity of thermal radiation than that of the first region.