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. 11, 1980
Filed:
Dec. 28, 1978
Applicant:
Inventors:
Robert A Featherstone, Northcliff, ZA;
Paul P Roos, Florida, ZA;
Willem A Gericke, Meyerton, ZA;
Jean Saleil, Saint-Etienne, FR;
Pierre J Leroy, Saint-Germain-en-Laye, FR;
Jean-Marcel Masson, Saint-Etienne, FR;
Assignees:
S.A. Manganese Amcor Ltd., Johannesburg, ZA;
Creusot-Loire, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
75 60 ; 75 59 ;
Abstract
Ferro-manganese is decarburized from a carbon content of as high as 7.5% down to 2% or less by blowing an oxidizing gas into the melt in two stages through one or more immersed tuyeres protected with a peripheral fluid introduced into said tuyeres, utilizing temperatures between 1650.degree. and 1750.degree. C.