John William Langhans JR.

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Spring Creek, NV, US

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Patents Grantslast 30 patents

Information Patent Grant
Alkaline and acid pressure oxidation of precious metal-containing m...
- Patent number 9,534,273
- Issue date Jan 3, 2017
- John William Langhans
- 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
Alkaline and acid pressure oxidation of precious metal-containing m...
- Patent number 8,623,115
- Issue date Jan 7, 2014
- Barrick Gold Corporation
- John William Langhans
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Patents Applicationslast 30 patents

Information Patent Application
MULTI-STAGED HIGH TEMPERATURE PRESSURE OXIDATION PROCESS FOR DOUBLE...
- Publication number 20230077051
- Publication date Mar 9, 2023
- Steven Wayne Yopps
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
ALKALINE AND ACID PRESSURE OXIDATION OF PRECIOUS METAL-CONTAINING M...
- Publication number 20140096649
- Publication date Apr 10, 2014
- BARRICK GOLD CORPORATION
- John William Langhans
- 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...