Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8398740 | Method for the production of metal powder | Mikko Ruonala | 2013-03-19 |
| 7811534 | Method for the treatment of copper-bearing materials | Stig-Erik Hultholm, Teemu Ritasalo, Mikko Ruonala | 2010-10-12 |
| 7789332 | Method for controlling oxygen when separating minerals from a slurry | Heikki Laurila, Mikko Ruonala | 2010-09-07 |
| 7785395 | Method for the recovery of gold from sulphide concentrate | Jaakko Leppinen, Olli Hyvärinen, Veikko Palosaari, Matti Hämäläinen | 2010-08-31 |
| 7510593 | Method for producing concentrates | Mikko Ruonala | 2009-03-31 |
| 7494528 | Method for smelting copper concentrates | Mikko Ruonala | 2009-02-24 |
| 5108495 | Method controlling a process by impedance analysis | Kaarlo M. J. Saari | 1992-04-28 |
| 5009870 | Method for removing sulphur and nitrogen compounds from gas | Olli Hyvärinen, Maija-Leena Metsarinta | 1991-04-23 |
| 4917775 | Method for measuring and adjusting electrochemical potential and/or component content in the process of treating valuable materials | Seppo V. Rantapuska | 1990-04-17 |
| 4740239 | Process for exploitation of low grade oxidic and iron-bearing complex ores or concentrates | Frans H. Tuovinen, Stig-Erik Hultholm, Risto J. Honkala, Helge Krogerus, Matti E. Honkaniemi | 1988-04-26 |
| 4561970 | Process for the froth flotation of complex metal compounds | Kaarlo M. J. Saari | 1985-12-31 |
| 4483827 | Hydrometallurgical process for the recovery of valuable metals from sulfidic, silicate-containing raw materials | — | 1984-11-20 |
| 4393029 | Process for the production of an iron-free chronium (III) compound | Stig-Erik Hultholm, Frans H. Tuovinen | 1983-07-12 |
| 4284665 | Process for coating an electrically nonconductive material with metal | Frans H. Tuovinen | 1981-08-18 |
| 4243499 | Process for electrolytic recovery of zinc from zinc sulfate solutions | — | 1981-01-06 |
| 4219354 | Hydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metals | Jussi K. Rastas, Sigmund Fugleberg, Sitg-Erik Hultholm, Jaakko T. I. Poijarvi | 1980-08-26 |