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:
Oct. 12, 1993
Filed:
Oct. 29, 1990
Applicant:
Inventor:
John F McGahan, Knoxville, TN (US);
Assignee:
International Technology Corporation, Knoxville, TN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B09B / ;
U.S. Cl.
CPC ...
405128 ; 106900 ; 423 87 ; 423601 ;
Abstract
The specification discloses a method for the treatment of particulate materials such as soils and sludges containing arsenic compounds which comprises contacting the material with a source of iron (III) ions and a source of magnesium (II) ions to stabilize the material against leaching of arsenic. A preferred source of iron (III) ions is iron (III) sulfate and a preferred source of magnesium (II) ions is magnesium oxide.