Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6274104 | Non-ferrous metal recovery method utilizing a melt sulphation reaction | Jussi K. Rastas | 2001-08-14 |
| 5082638 | Process of recovering non-ferrous metal values, especially nickel, cobalt, copper and zinc, by using melt and melt coating sulphation, from raw materials containing said metals | Jussi K. Rastas | 1992-01-21 |
| 4464344 | Process for recovering non-ferrous metal values from ores, concentrates, oxidic roasting products or slags | — | 1984-08-07 |
| 4355005 | Process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and cadmium | Jussi K. Rastas, Risto J. Honkala | 1982-10-19 |