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:
Mar. 22, 1988
Filed:
Aug. 25, 1986
Donald M Cunningham, Pittsburgh, PA (US);
Emerson Electric Co., St. Louis, MO (US);
Abstract
An electric heating element with a resistance element, a metal sheath in heat transfer relation to the resistance element on one side of the sheath and a thin, dry coating of refractory material major proportion by weight of which is boron nitride on another side of the sheath to be placed in heat transfer relation to an object to be heated. A method of enhancing the heat-transfer qualities of a metal sheathed electric heating element includes coating the metal sheath, on a surface to be placed in heat-transfer relation to an object to be heated, with a liquid slurry of refractory material a major proportion of which is boron nitride, drying and outgassing the coating and mounting the sheathed element on an object to be heated with the coating in contact with the object.