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:
Nov. 25, 1997
Filed:
Jun. 15, 1995
Applicant:
Inventors:
Eric Hanse, Elouges, BE;
Phillipe Dumas, Feignies, FR;
Assignee:
Vesuvius Crucible Company, Wilmington, DE (US);
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
428408 ; 501 99 ; 501100 ; 222591 ; 222600 ; 222601 ; 222606 ; 222607 ; 428688 ; 428689 ; 428698 ; 428701 ; 428702 ; 428446 ;
Abstract
The invention concerns a component for the pouring of steel that has a body (2) of a refractory material containing carbon. It has a layer (10) that covers the body partially or completely and is capable of forming a surface layer (10a) that is oxidized and densified and is impermeable to gases when it is brought to a temperature above 1000.degree. C. The layer (10) is comprised of a refractory material containing sintering precursors chosen in the group consisting of calcined alumina, reactive calcined alumina, silica fumes and clays.