Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5855736 | Method of reducing corrosion in a power boiler of a pulp mill | Keijo Salmenoja, Kari Mäkelä, Jouni Kinni | 1999-01-05 |
| 5662774 | Adjusting the sulphur balance of a sulphate cellulose plant by heat treating black liquor in a last evaporation stage | Jari Ekholm | 1997-09-02 |
| 5639434 | Process for removing nitrogen oxides from the flue gases of a pulp mill | Tapio Patrikainen, Ari Tamminen, Seppo Tuominiemi, Jukka-Pekka Spets, Risto Hämäläinen | 1997-06-17 |
| 5562804 | Method for adjusting the sulphur/sodium ratio in the flue gases of a soda recovery boiler | Seppo Tuominiemi, Keijo Imelainen, Pauli Harila, Veli-Antti Kivilinna, Ahti Klami | 1996-10-08 |
| 4705631 | Thickener | Jouko Hautala | 1987-11-10 |