Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4710277 | Method for manufacturing zinc hydrometallurgically | Froystein Dyvik | 1987-12-01 |
| 4585477 | Method for separating and recovering nickel and copper from complex materials | — | 1986-04-29 |