Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7497023 | Offset line alignment tool | Brian Simmons | 2009-03-03 |
| 7219804 | Flotation processing including recovery of soluble nonferrous base metal values | John C. Gathje | 2007-05-22 |
| 6679383 | Flotation of platinum group metal ore materials | John C. Gathje | 2004-01-20 |
| 6641642 | High temperature pressure oxidation of ores and ore concentrates containing silver using controlled precipitation of sulfate species | John C. Gathje | 2003-11-04 |
| 6210648 | Method for processing refractory auriferous sulfide ores involving preparation of a sulfide concentrate | John C. Gathje | 2001-04-03 |
| 5851499 | Method for pressure oxidizing gold-bearing refractory sulfide ores having organic carbon | John C. Gathje | 1998-12-22 |
| 5837210 | Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate | John C. Gathje | 1998-11-17 |
| 5653945 | Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate | John C. Gathje | 1997-08-05 |
| 5536480 | Method for treating mineral material having organic carbon to facilitate recovery of gold and silver | — | 1996-07-16 |
| 5458866 | Process for preferentially oxidizing sulfides in gold-bearing refractory ores | — | 1995-10-17 |