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. 18, 2004
Filed:
Aug. 01, 2002
Masato Taniguchi, Aichi, JP;
Fumihiko Haraguchi, Nagoya, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A ceramic heater includes a rod-shaped heater body provided with an insulating ceramic substrate, a heating resistor embedded in a front end portion of the ceramic substrate and a pair of first and second electric conductors embedded in the ceramic substrate with front end portions thereof electrically connected to the heating resistor and rear end portions thereof exposed at a rear end surface of the heater body. The ceramic heater further includes first and second lead-out members having front surfaces joined to parts of the rear end surface of the heater body via metallic layers so as to cover the exposed rear end portions of the first and second electric conductors, respectively, and to be kept from covering an outer circumferential surface of the heater body.