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:
Oct. 10, 2000
Filed:
Dec. 05, 1997
Hideki Kita, Kanagawa-ken, JP;
Isuzu Ceramics Research Institute Co., Ltd, Kanagawa-ken, JP;
Abstract
This ceramic heater is increased in bulk density and decreased in production cost by using an unsintered composite as an unsintered filling member filled in a protective pipe without application thereto of a filling pressure while preventing a heating element from deteriorating. In this ceramic heater, the heating element capable of heating by flowing electricity therethrough is disposed in the protective pipe, which is filled with the unsintered composite. In the unsintered composite, inorganic compound particles are disposed between insulating ceramic particles. In this ceramic heater, the heating element is fixed to the inner wall surface of the protective pipe with a heat-resistant glass layer. The heat-resistant glass layer is partially penetrated into the unsintered composite. The open end portion of the protective pipe is hermetically sealed with a heat-resistant sealing member while allowing extension of lead wires from the end portion of the protective pipe.