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:
Aug. 02, 1994
Filed:
Sep. 27, 1993
John Hughes, Arlington Hgts., IL (US);
American Colloid Company, Arlington Heights, IL (US);
Abstract
Molten metal is cast into a mold cavity formed of sand held in a predetermined mold configuration by a binder comprising a plurality of sodium bentonite clays. A blend of two or more sodium bentonite clays obtained from different areas as a foundry sand binder synergistically and unexpectedly improves the foundry sand used as a mold cavity for casting metal objects by unexpectedly improving one or more of the following foundry sand properties beyond the level of either of the blended sodium bentonites alone: green compressive strength; hot compressive strength; dry compressive strength; wet tensile strength; flowability; surface finish; activation speed and shakeout.