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. 15, 1990
Filed:
Sep. 21, 1987
Applicant:
Inventors:
Anant H Kelkar, Nanuet, NY (US);
Frank A Capodicasa, Woodcliff Lake, NJ (US);
Jerry G Weinstein, Newark, DE (US);
Assignee:
The Interlake Corporation, Oak Brook, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B28B / ;
U.S. Cl.
CPC ...
106 3835 ; 106 3827 ; 106 3822 ; 106 389 ; 164516 ; 164518 ; 164522 ;
Abstract
A fired ceramic core for use in aluminum investment casting, which will withstand steam autoclaving and which may be rendered water disruptible; comprising from about 20 to 50% by weight of one or more water soluble salts, together with inert ceramic fillers selected to meet desired thermoexpansion compatability for the shell with which said core is to be used; said core being vacuum impregnated with ethyl silicate and a cured phenolic resin.