Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5397380 | Method for processing complex metal sulphide materials | Ake Sandstrom | 1995-03-14 |
| 5192487 | Apparatus for treating zinc concentrates | Rolf E. Malmstrom | 1993-03-09 |
| 5141720 | Catalyst bed for exothermal reactions between gases and/or other fluids | Rolf E. Malmstrom | 1992-08-25 |
| 5131944 | Method and apparatus for treating zinc concentrates | Rolf E. Malmstrom | 1992-07-21 |
| 4584017 | Method for producing metallic lead by direct lead-smelting | Bjorn K. V. Lindquist | 1986-04-22 |
| 4571260 | Method for recovering the metal values from materials containing tin and/or zinc | Leif Johansson, Bengt O. Rudling | 1986-02-18 |
| 4520003 | Method of manufacturing sulphur-trioxide for the production of sulphuric acid | Ulf C. Waara | 1985-05-28 |
| 4515631 | Method for producing blister copper | Bjorn K. V. Lindquist | 1985-05-07 |
| 4514217 | Method of producing lead from sulphidic lead raw-material | — | 1985-04-30 |
| 4489046 | Method for working-up arsenic-containing waste | Bengt S. Eriksson | 1984-12-18 |
| 4447963 | Method for producing a fuel from solid bituminous and/or lignocellulosic material | — | 1984-05-15 |
| 4396426 | Manufacture of lead from sulphidic lead raw material | Torsten E. Jensfelt | 1983-08-02 |
| 4388110 | Method for recovering the metal content of complex sulphidic metal raw materials | Torsten E. Jensfelt | 1983-06-14 |
| 4251715 | Method for directly heating concentrated sulfuric acid by electric current flow between surface-passivated electrodes | Allan F. Norro | 1981-02-17 |
| 4244733 | Method of producing blister copper from copper raw material containing antimony | Bengt S. Eriksson, Arne C. Fridfeldt | 1981-01-13 |
| 4204861 | Method of producing blister copper | Bengt S. Eriksson | 1980-05-27 |