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:
Jan. 24, 1978
Filed:
Aug. 13, 1976
Roman M Genik-Sas-Berezowsky, Edmonton, CA;
Verner B Sefton, Edmonton, CA;
Lynton S Gormely, North Vancouver, CA;
Sherritt Gordon Mines Limited, Toronto, CA;
Abstract
Gold, as well as copper, is recovered from copper bearing sulphidic material containing gold. The copper bearing sulphidic material is subjected to a main leach to provide a copper containing main leach liquor and a main residue. A secondary leach with ammonium thiosulphate solution is carried out on the copper bearing sulphidic material before the main leach, or on the residue from the main leach, to provide a gold containing secondary leach liquor and a secondary residue. Copper and gold are recovered from the respective leach liquors. Silver may also be recovered in addition to the gold.