Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5611989 | Method for producing easily volatile materials | Heikki Eerola, Antti Roine | 1997-03-18 |
| 5403380 | Method for producing easily volatile metals, such as zinc, lead, mercury and cadmium, of sulfidic raw materials | Heikki Eerola | 1995-04-04 |
| 4937057 | Method for removing sulphur in elemental form from gases containing sulphur dioxide or sulphur dioxide and hydrogen sulphide | Jaakko T. I. Poijarvi | 1990-06-26 |
| 4861577 | Method for removing the sulphur content of a weak gas containing sulfur dioxide | Jaakko T. I. I Poijarvi, Maija-Leena Metsarinta | 1989-08-29 |
| 4737186 | Method for continuous reduction of molten metallurical slag in an electric furnace | Erkki Krogerus | 1988-04-12 |
| 4568065 | Means for separating solid and molten particles from the exhaust gases of metallurgical furnaces and way to recover lead from such gases | — | 1986-02-04 |
| 4465512 | Procedure for producing lead bullion from sulphide concentrate | Esko O. Nermes | 1984-08-14 |
| 4388111 | Process for the recovery of lead from a lead-bearing sulfide concentrate | Tuula Makinen | 1983-06-14 |