Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5574956 | Method and apparatus for treatment sulphidic concentrates | — | 1996-11-12 |
| 5445667 | Method for reducing material containing metal oxide in solid phase | — | 1995-08-29 |
| 5254320 | Method for roasting sulphide ores | — | 1993-10-19 |
| 5192487 | Apparatus for treating zinc concentrates | Stig A. Petersson | 1993-03-09 |
| 5141720 | Catalyst bed for exothermal reactions between gases and/or other fluids | Stig A. Petersson | 1992-08-25 |
| 5131944 | Method and apparatus for treating zinc concentrates | Stig A. Petersson | 1992-07-21 |
| 5029556 | Method of recovering heat from hot process gases | Pekka Ritakallio | 1991-07-09 |
| 5013355 | Method and apparatus for producing matte and/or metal | Hans I. Elvander | 1991-05-07 |
| 4976776 | Method for reduction of material containing metal oxide using a fluidized bed reactor and flame chamber | Hans I. Elvander | 1990-12-11 |
| 4578254 | Process for the refining of sulfidic concentrates which contain arsenic, antimony and bismuth | — | 1986-03-25 |
| 4478394 | Apparatus for the separation of lead from a sulfidic concentrate | Olavi A. Aaltonen, Esko O. Nermes, Tapio K. Tuominen | 1984-10-23 |
| 4391632 | Process for the separation of lead from a sulfidic concentrate | Olavi A. Aaltonen, Esko O. Nermes, Tapio K. Tuominen | 1983-07-05 |