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:
Dec. 12, 1995
Filed:
Mar. 25, 1994
Applicant:
Inventors:
Helena J Twardowska, Burnaby, CA;
Heimo J Langer, Columbus, OH (US);
Assignee:
Ashland Inc., Columbus, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; B28B / ;
U.S. Cl.
CPC ...
106632 ; 106600 ; 106634 ; 106 383 ; 106 389 ; 264319 ; 264239 ; 264299 ;
Abstract
This invention relates to heat curable foundry binder systems comprising as separate components (a) a caustic solution of an alkali silicate and (b) hydrated aluminum silicate. The solution is mixed with sand to form a foundry mix. The resulting foundry mix is shaped and heated at an elevated temperature to form a cured foundry shape. Heat is applied by warm air, baking in an oven, microwave, or preferably from hot-box equipment.