Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9545636 | Method for processing mineral material containing acid-consuming carbonate and precious metal in sulfide minerals | James Nicholas Orlich, Ronel Du Plessis Kappes | 2017-01-17 |
| 7219804 | Flotation processing including recovery of soluble nonferrous base metal values | Gary L. Simmons | 2007-05-22 |
| 6679383 | Flotation of platinum group metal ore materials | Gary L. Simmons | 2004-01-20 |
| 6641642 | High temperature pressure oxidation of ores and ore concentrates containing silver using controlled precipitation of sulfate species | Gary L. Simmons | 2003-11-04 |
| 6210648 | Method for processing refractory auriferous sulfide ores involving preparation of a sulfide concentrate | Gary L. Simmons | 2001-04-03 |
| 5851499 | Method for pressure oxidizing gold-bearing refractory sulfide ores having organic carbon | Gary L. Simmons | 1998-12-22 |
| 5837210 | Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate | Gary L. Simmons | 1998-11-17 |
| 5653945 | Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate | Gary L. Simmons | 1997-08-05 |
| 4552589 | Process for the recovery of gold from refractory ores by pressure oxidation | Peter G. Mason, Frank D. Wicks | 1985-11-12 |
| 4283277 | Beneficiation of trona by flotation | Robert J. Brison | 1981-08-11 |