Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4740239 | Process for exploitation of low grade oxidic and iron-bearing complex ores or concentrates | Frans H. Tuovinen, Seppo Heimala, Stig-Erik Hultholm, Helge Krogerus, Matti E. Honkaniemi | 1988-04-26 |
| 4355005 | Process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and cadmium | Jussi K. Rastas, Pekka J. Saikkonen | 1982-10-19 |
| 4313849 | Process for the production of activated carbon from a moist organic substance | Frans H. Tuovinen, Maija-Leena Metsarinta | 1982-02-02 |