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:
Nov. 16, 1982
Filed:
Oct. 19, 1981
Applicant:
Inventor:
James Van Fisk, Jr, Houston, TX (US);
Assignee:
NL Industries, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B28B / ;
U.S. Cl.
CPC ...
106 383 ; 106 3835 ; 106 389 ; 501127 ;
Abstract
Bentonite clay and water soluble aluminum salt compositions are provided which are useful in replacing the binding clay in foundry sand molds which has been deactivated by molten metal cast in the molds. Aluminum sulfate is the preferred aluminum salt. The clay and aluminum salt are applied in making pumpable slurries for foundry sand make-up applications containing up to 26% by weight of clay and sufficient aluminum salt to provide a weight ratio of clay to aluminum salt of from 1/1 to 99/1. Sand mixes containing the clay and aluminum salt are also provided characterized by increased hot strengths over sand mixes containing no aluminum salt.