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:
Mar. 01, 2005
Filed:
Jun. 04, 2003
Applicant:
Don Eisenhour, Grayslake, IL (US);
Inventor:
Don Eisenhour, Grayslake, IL (US);
Assignee:
American Colloid Company, Arlington Heights, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22C001/18 ;
U.S. Cl.
CPC ...
Abstract
A foundry sand binder formed by reacting a smectite clay containing exchangeable calcium ions with an acid to enhance the ability of the clay to bind sand in forming a metal casting sand mold. The acid-treated clay is an excellent sand binder for metal casting molds and produces cast metal parts having improved surface finish with the elimination or substantial reduction in carbonaceous, e.g., coal, foundry sand additive, while reducing VOC emissions from the foundry.