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:
Oct. 12, 1993
Filed:
Oct. 26, 1992
Applicant:
Inventors:
Charles W Finkl, Evanston, IL (US);
Guy A Brada, Chicago, IL (US);
Algirdas A Underys, Arlington Heights, IL (US);
Assignee:
A. Finkl & Sons Co., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
75508 ; 266207 ; 373 60 ;
Abstract
A method and apparatus for producing high quality steel having less than about 1 ppm H, 50 ppm N, 25 ppm O and 0.005 S which includes subjection to vacuum, gas purging, and alternating current heating arcs, followed by shrouded pouring into sealed ingot molds to form a VAR electrode which is subsequently remelted under a very low absolute vacuum and re-solidified.