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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.:

US 4639712 B1

PDFFull Text
Date of Patent:
Jan. 27, 1987

Filed:

Oct. 21, 1985

Sheathed heater

Applicant:
Inventors:

Akihiro Kobayashi, Hazu, JP;

Shunzo Yamaguchi, Okazaki, JP;

Kiyomi Kobayashi, Kariya, JP;

Hiroaki Takaba, Ohbu, JP;

Assignee:

Nippondenso Co., Ltd., Kariya, JP;

Attorney:

Cushman, Darby & Cushman

Primary Examiner:

E A Goldberg

Assistant Examiner:

Linda M Peco

Int. Cl.
CPC ...
H01C / ; H01C / ; H01M / ; H01M / ;
U.S. Cl.
CPC ...
338238 ; 338243 ; 338251 ; 429133 ; 429112 ;
Abstract

A sheathed heater comprising a metallic sheath, such as a stainless steel sheath, an electric heating element disposed within the sheath so that an electric current can be supplied thereto, and a filling material filled in the sheath for insulating the heating element from the sheath and the coils of the heating element from each other. Aluminum nitride powder is used as the filling material to prevent oxidation of the heating element by the oxygen discharged from the filling material.

Find Patent Forward Citations

Kobayashi, Akihiro. (1987). Sheathed heater (U.S. Patent No. 4639712). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4639712

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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