Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7517383 | Method for recovery of zinc by countercurrent leaching | Aimo Järvinen, Marko Lahtinen | 2009-04-14 |
| 7481865 | Method for removing mercury from gas | Heljä Peltola, Pekka Taskinen, Jens Nyberg, Harri Natunen, Jorma Panula | 2009-01-27 |
| 7294319 | Method for precipitating iron from a zinc sulphate solution as hematite | Marko Lahtinen, Leena Lehtinen | 2007-11-13 |
| 6793816 | Equipment for the leaching of solid matter from sludge | Yrjo Oinonen, Kurt Höglund | 2004-09-21 |
| 6770207 | Method for the leaching of solid matter from sludge | Yrjo Oinonen | 2004-08-03 |