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:
May. 11, 1999
Filed:
Aug. 07, 1997
Applicant:
Inventors:
Regis M Perich, Boalsburg, PA (US);
Tomas Richter, State College, PA (US);
Assignee:
North American Refractories Co., Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
222606 ; 501 99 ; 501103 ;
Abstract
A molten steel pouring nozzle having a bore therethrough, at least a portion of the nozzle forming the bore being comprised of a refractory having calcium zirconate: from 20 to 75 weight %, graphite: from 5 to 30 weight %, and calcium silicide: from 0.5 to 15 weight %.