Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5171428 | Flotation separation of arsenopyrite from pyrite | Jean P. Duteroue | 1992-12-15 |
| 4878945 | Hydrometallurgical process for treating refractory ores containing precious metals | Rein Raudsepp | 1989-11-07 |
| 4647307 | Process for recovering gold and silver from refractory ores | Rein Raudsepp, Ernest Peters | 1987-03-03 |
| 4632738 | Hydrometallurgical copper process | William G. Bacon, Rein Raudsepp | 1986-12-30 |