Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4252622 | Continuous process for the purification of zinc plants electrolytes using copper arsenates | Kayo Kangas | 1981-02-24 |
| 4225342 | Treatment of zinc plant leach residues for recovery of the contained metal values | David Nightingale | 1980-09-30 |
| 4209379 | Cathode stripping system | Victor Robinson | 1980-06-24 |