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:
Apr. 22, 2003
Filed:
Feb. 20, 2001
Applicant:
Inventors:
William A. Farone, Irvine, CA (US);
Maryam H. Azad, Los Angeles, CA (US);
Assignee:
Green Mineral Products LLC, San Antonio, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B 3/10 ;
U.S. Cl.
CPC ...
C22B 3/10 ;
Abstract
A process for the recovery of gold and the platinum group metals from sources that contain relatively low amounts of the metals is described. The process is environmentally acceptable and uses no expensive and potentially dangerous organic solvents. The process utilizes hydrogen chloride, sodium hydroxide, and cation resins to concentrate and purify the precious metals