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:
Sep. 19, 1978
Filed:
Nov. 12, 1976
Applicant:
Inventors:
Jean Dewitte, Boulogne, FR;
Pierre Letourneur, Paris, FR;
Assignee:
Compagnie Internationale de Minerallurgie-CIM, Neuilly-sur-Seine, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264221 ; 65 72 ; 264235 ; 264299 ; 264317 ; 264D / ;
Abstract
A method for casting vitreous materials using the lost wax process in which a pattern of the article to be cast is formed with a substance which is vaporized at the casting temperature of the vitreous material. The pattern is embedded in a heat resistant silica compound such as sand which surrounds the pattern to form a casting mold. The sand is contained in a receptacle called a casting shell. The vitreous material is heated to a temperature at which its viscosity is between 20 and 100 poises and the article is cast.