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. 25, 1986
Filed:
Apr. 17, 1984
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A conduit tube of an electrode device for electrically heating underground hydrocarbon resources, which comprises: a metal conduit tube and an electrically insulative covering adhered on and around the outer peripheral surface of said metal conduit tube, said electrically insulative covering being formed by adhering polyether/ether/ketone resin in powder form having particle size of a range of from 10 to 100 .mu.m on and around said metal conduit tube which has been preheated to a temperature range of from 350.degree. C. to 450.degree. C. by the electrostatic coating method, and fusion-bonding the electrically insulative covering material thereon at said temperature range of the preheating.