Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4366127 | Hydrometallurgical process for the recovery of lead, silver and gold, as well as zinc, from impure jarosite residues of an electrolytic zinc process | Jens Nyberg | 1982-12-28 |
| 4362702 | Hydrometallurgical process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and cadmium | Jens Nyberg, Kauko Karpale, Lars-Goran Bjorkqvist | 1982-12-07 |
| 4355005 | Process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and cadmium | Pekka J. Saikkonen, Risto J. Honkala | 1982-10-19 |