Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8021459 | Method and apparatus for controlling metal separation | Kai Judin, Harri Natunen, Yrjo Oinonen, Panu Talonen | 2011-09-20 |
| 7645372 | Method for removing thallium from a zinc-containing solution | — | 2010-01-12 |
| 7517383 | Method for recovery of zinc by countercurrent leaching | Marko Lahtinen, Heikki Takala | 2009-04-14 |
| 6340450 | Method for leaching zinc concentrate in atmospheric conditions | Sigmund Fugleberg | 2002-01-22 |
| 5120353 | Hydrometallurgic method for processing raw materials containing zinc sulphide | Sigmund Fugleberg | 1992-06-09 |
| 4385038 | Flotation recovery of lead, silver and gold as sulfides from electrolytic zinc process residues | Jussi K. Rastas, Kaarlo M. J. Saari, Vaino V. H. Hintikka, Jaakko Leppinen | 1983-05-24 |