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. 06, 1990
Filed:
Jun. 19, 1989
Applicant:
Inventors:
Heribert Konig, Duisburg, DE;
Heinz Stark, Essen, DE;
Assignee:
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
373102 ;
Abstract
An electric reduction furnace with a furnace vessel having a refractory lining and electrodes which are connected to a three-phase current power supply unit and which extend into the furnace vessel. In the region between, in each case, two first electrodes (21-22, 22-23, 23-21) and the wall of the furnace vessel, additional second electrodes (31-33) ae provided which form with each two of the first electrodes substantially isosceles triangles. The additional second electrodes (30-33) extend substantially parallel to the first electrodes (21-23) and are electrically connected to the furnace lining (14).