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:
Jan. 13, 1981
Filed:
Mar. 14, 1979
Applicant:
Inventor:
Harald Krogsrud, Gjettum, NO;
Assignee:
Elkem-Spigerverket, A/S, Oslo, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F27D / ;
U.S. Cl.
CPC ...
13 35 ;
Abstract
An improved roof for covered electric smelting furnaces is disclosed. Cooling pipes are disposed on the outside of the roof and are of sufficient capacity and spacing to maintain a temperature on the inside of the roof of 150.degree. C.-400.degree. C. A sealing arrangement for adjacent sectors of the roof is also disclosed.