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:
Aug. 17, 1982
Filed:
Oct. 11, 1978
Applicant:
Inventor:
Wolfgang Dietze, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
F27B / ; H05B / ; H01C / ;
U.S. Cl.
CPC ...
219390 ; 219301 ; 219553 ; 338330 ; 338334 ; 428 36 ;
Abstract
Directly heatable tubular semiconductor bodies are produced by pyrolytically depositing a continuous layer of silicon or silicon carbide from a thermally decomposable silicon compound onto a heated graphite mandrel, non-destructively removing the so-deposited tubular body from the mandrel, applying a dopant-containing lacquer or the like onto select outer surface portions of such tubular body and subjecting the so-coated tubular body to diffusion conditions sufficient to dope the select outer body portions of the body and render such body directly heatable via an applied electrical current.