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. 05, 2002
Filed:
Mar. 23, 1999
Applicant:
Inventors:
Edward Carroll Hale, III, Franklin, IN (US);
John E. Wildey, Greenfield, IN (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
A62D 3/00 ; C09C 1/00 ;
U.S. Cl.
CPC ...
A62D 3/00 ; C09C 1/00 ;
Abstract
A method of treating metal-contaminated spent foundry sand, or other industrial waste, by combining the sand with a sulfite to produce insoluble metal sulfur oxide complexes that do not leach from the sand. The treated waste may also be processed to reduce “clumping,” thereby rendering the treated waste appropriate for use in another industrial process.