Hydrochem Developments Ltd.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hydrochem Developments Ltd..The latest application filed is for "process for recovering gold from refractory sulfidic ores".
- Hydrochem Developments Ltd. - Brampton Ontario CA
| Patent | Date |
|---|---|
| Process for recovering gold from refractory sulfidic ores Grant 5,013,359 - Fair , et al. May 7, 1 | 1991-05-07 |
| Oxidation process for releasing metal values in which nitric acid is regenerated in situ Grant 4,834,793 - Schneider , et al. * May 30, 1 | 1989-05-30 |
| Flotation apparatus Grant 4,750,994 - Schneider June 14, 1 | 1988-06-14 |
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