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Yeonuk Choi
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Toronto, CA
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Patents Grants
last 30 patents
Information
Patent Grant
Method for pre-treatment of gold-bearing oxide ores
Patent number
11,401,580
Issue date
Aug 2, 2022
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Method for pre-treatment of gold-bearing oxide ores
Patent number
10,597,752
Issue date
Mar 24, 2020
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Co-current and counter current resin-in-leach in gold leaching proc...
Patent number
10,415,116
Issue date
Sep 17, 2019
Barrick Gold Corporation
Yeonuk Choi
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Method for pre-treatment of gold-bearing oxide ores
Patent number
10,161,016
Issue date
Dec 25, 2018
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Method for arsenic oxidation and removal from process and waste sol...
Patent number
10,077,487
Issue date
Sep 18, 2018
Barrick Gold Corporation
Yeonuk Choi
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Use of cationic surfactants in the cyanidation of refractory carbon...
Patent number
9,803,260
Issue date
Oct 31, 2017
Akzo Nobel Chemicals International B.V.
Qiong Zhou
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Co-current and counter current resin-in-leach in gold leaching proc...
Patent number
9,790,572
Issue date
Oct 17, 2017
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Method for recovering precious metals and copper from leach solutions
Patent number
9,051,625
Issue date
Jun 9, 2015
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Production of zinc sulphate concentrates from a dilute zinc sulphat...
Patent number
8,900,535
Issue date
Dec 2, 2014
Barrick Gold Corporation
Yeonuk Choi
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Co-current and counter current resin-in-leach in gold leaching proc...
Patent number
8,715,389
Issue date
May 6, 2014
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for controlling acid in sulfide pressure oxidation processes
Patent number
8,262,770
Issue date
Sep 11, 2012
Barrick Gold Corporation
Daniel Hillier
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for reduced alkali consumption in the recovery of silver
Patent number
8,252,254
Issue date
Aug 28, 2012
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for mercury control during pressure oxidation
Patent number
7,918,919
Issue date
Apr 5, 2011
Barrick Gold Corporation
Daniel Hillier
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Selective precipitation of metal sulfides
Patent number
7,862,786
Issue date
Jan 4, 2011
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Thiosulfate generation in situ in precious metal recovery
Patent number
7,572,317
Issue date
Aug 11, 2009
Barrick Gold Corporation
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Patents Applications
last 30 patents
Information
Patent Application
METHOD FOR PRE-TREATMENT OF GOLD-BEARING OXIDE ORES
Publication number
20200165702
Publication date
May 28, 2020
BARRICK GOLD CORPORATION
Yeonuk Choi
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Co-Current and Counter Current Resin-In-Leach in Gold Leaching Proc...
Publication number
20180030571
Publication date
Feb 1, 2018
BARRICK GOLD CORPORATION
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
METHOD FOR PRE-TREATMENT OF GOLD-BEARING OXIDE ORES
Publication number
20180030572
Publication date
Feb 1, 2018
BARRICK GOLD CORPORATION
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
Use of Cationic Surfactants In the Cyanidation of Refractory Carbon...
Publication number
20160024613
Publication date
Jan 28, 2016
Akzo Nobel Chemicals International B.V.
Qiong Zhou
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
METHOD FOR PRE-TREATMENT OF GOLD-BEARING OXIDE ORES
Publication number
20140356225
Publication date
Dec 4, 2014
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
METHOD FOR ARSENIC OXIDATION AND REMOVAL FROM PROCESS AND WASTE SOL...
Publication number
20140356261
Publication date
Dec 4, 2014
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
Co-Current and Counter Current Resin-In-Leach in Gold Leaching Proc...
Publication number
20140035207
Publication date
Feb 6, 2014
BARRICK GOLD CORPORATION
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
METHOD FOR RECOVERING PRECIOUS METALS AND COPPER FROM LEACH SOLUTIONS
Publication number
20130091990
Publication date
Apr 18, 2013
BARRICK GOLD CORPORATION
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
CO-CURRENT AND COUNTER CURRENT RESIN-IN-LEACH IN GOLD LEACHING PROC...
Publication number
20120183433
Publication date
Jul 19, 2012
BARRICK GOLD CORPORATION
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
PRODUCTION OF ZINC SULPHATE CONCENTRATES FROM A DILUTE ZINC SULPHAT...
Publication number
20110165059
Publication date
Jul 7, 2011
BARRICK GOLD CORPORATION
Yeonuk Choi
C01 - INORGANIC CHEMISTRY
Information
Patent Application
MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY GOLD ORES
Publication number
20090158893
Publication date
Jun 25, 2009
BARRICK GOLD CORPORATION
Wan-Tai Yen
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
PROCESS FOR MERCURY CONTROL DURING PRESSURE OXIDATION
Publication number
20090074608
Publication date
Mar 19, 2009
BARRICK GOLD CORPORATION
Daniel Hillier
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
PROCESS FOR CONTROLLING ACID IN SULFIDE PRESSURE OXIDATION PROCESSES
Publication number
20090071296
Publication date
Mar 19, 2009
BARRICK GOLD CORPORATION
Daniel Hillier
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
SELECTIVE PRECIPITATION OF METAL SULFIDES
Publication number
20080274026
Publication date
Nov 6, 2008
BARRICK GOLD CORPORATION
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
PROCESS FOR REDUCED ALKALI CONSUMPTION IN THE RECOVERY OF SILVER
Publication number
20070292326
Publication date
Dec 20, 2007
BARRICK GOLD CORPORATION
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
THIOSULFATE GENERATION IN SITU IN PRECIOUS METAL RECOVERY
Publication number
20070137437
Publication date
Jun 21, 2007
BARRICK GOLD CORPORATION
Yeonuk Choi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...