Langhans, Jr.; John William
Patent Applications and Registrations
Patent applications and USPTO patent grants for Langhans, Jr.; John William.The latest application filed is for "method for recovering precious metals and copper from leach solutions".
- Langhans, Jr.; John William - Spring Creek NV
| Patent | Date |
|---|---|
| Alkaline and acid pressure oxidation of precious metal-containing materials Grant 9,534,273 - Langhans, Jr. , et al. January 3, 2 | 2017-01-03 |
| Method for recovering precious metals and copper from leach solutions Grant 9,051,625 - Choi , et al. June 9, 2 | 2015-06-09 |
| Alkaline and acid pressure oxidation of precious metal-containing materials Grant 8,623,115 - Langhans, Jr. , et al. January 7, 2 | 2014-01-07 |
| Method For Recovering Precious Metals And Copper From Leach Solutions App 20130091990 - Choi; Yeonuk ; et al. | 2013-04-18 |
| Alkaline And Acid Pressure Oxidation Of Precious Metal-containing Materials App 20120128528 - Langhans, JR.; John William ; et al. | 2012-05-24 |
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