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:
Jul. 28, 1987
Filed:
Jul. 06, 1984
Applicant:
Inventors:
Emilio Marino, Rome, IT;
Raffaele Mastromarino, Rome, IT;
Assignee:
Deltasider SpA, Piombino, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
222591 ; 501123 ;
Abstract
The improvement consists in forming the nozzles in two parts, the first as a body made of a refractory material, preferably zirconium oxide or magnesite, having a central axial cavity passing right through it, and the second as a body of a calcium-oxide based refractory material, having an appropriate passage for the liquid steel and located in said axial cavity.