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:
Apr. 09, 2002
Filed:
May. 18, 2001
Applicant:
Inventors:
Eric Hanse, Feignies, FR;
Pascal Dubois, Rue Parkeur, FR;
Assignee:
Vesuvius Crucible Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D 4/108 ;
U.S. Cl.
CPC ...
B22D 4/108 ;
Abstract
The present invention concerns a one-piece stopper rod whose gas tightness is improved. In particular, the stopper rod of the present invention has a body of refractory material comprised at least partially of a refractory material relatively impermeable to gases.