Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4654131 | Recovery of tungsten valves from alkaline solutions | — | 1987-03-31 |
| 4431613 | Leaching of sulphidic mattes containing non-ferrous metals and iron | — | 1984-02-14 |
| 4330379 | Leaching of zinc containing sulphide minerals | — | 1982-05-18 |
| 4274931 | Leaching process for zinc sulphide containing materials | — | 1981-06-23 |