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:
Jan. 11, 2000
Filed:
Nov. 18, 1997
Applicant:
Inventors:
Takanori Mizuno, Nagoya, JP;
Hiroyuki Kimata, Nagoya, JP;
Assignee:
NGK Spark Plug Co., Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F23Q / ;
U.S. Cl.
CPC ...
219270 ; 219544 ; 219541 ; 1231 / ;
Abstract
A heater main body (300) obtained by connecting one-side ends (331, 341) of lead-out tungsten wires (33, 34) having a metal deposit (301), e.g., silver, to the ends (321, 322) of a U-shaped heating resistor (32) is embedded in a ceramic powder. The powder containing the heater main body (300) embedded therein is press-molded into a given shape and then sintered by hot pressing to thereby obtain a ceramic heating element (3) in which the other ends (332, 342) of the lead-out wires are exposed on the surface of the resultant sintered body.