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:
Sep. 12, 2000
Filed:
Mar. 25, 1997
Applicant:
Inventor:
Teruhisa Sako, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ; H05B / ;
U.S. Cl.
CPC ...
219542 ; 219216 ;
Abstract
A heating device includes a substrate made of a heat-resistant insulating material, a heating resistor formed on the substrate, and a protective glass coating formed on the substrate to cover the heating resistor. The protective glass coating is formed of a glass material containing, as an additive, 3.about.40 wt % of alumina powder which has an average grain size of 0.5.about.2.0 .mu.m.