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:
Jun. 27, 2006
Filed:
May. 27, 2003
Jinxing Ji, Burnaby, CA;
Christopher Andrew Fleming, Omemee, CA;
Paul George West-sells, Vancouver, CA;
Ralph Peter Hackl, Vancouver, CA;
Jinxing Ji, Burnaby, CA;
Christopher Andrew Fleming, Omemee, CA;
Paul George West-Sells, Vancouver, CA;
Ralph Peter Hackl, Vancouver, CA;
Placer Dome Technical Services Limited, Vancouver, CA;
Abstract
Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polythionates, inert atmospheres to control polythionate production, and electrolytic solutions which provide relatively high rates of precious metal recovery.