Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9371987 | Structure of a super heater | Pertti Petänen, Kari Mäkelä, Ari Kokko | 2016-06-21 |
| 8821686 | Method and equipment for treatment of black liquor at pulp mill | Jani Lehto, Timo Honkola | 2014-09-02 |
| 8500954 | Method and apparatus for processing black liquor of pulp mill | Jani Lehto, Erkki Välimäki | 2013-08-06 |
| 6047649 | Method and arrangement in cooling medium circulation of a recovery boiler | Jussi Mantyniemi | 2000-04-11 |
| 5112441 | Process for the recovery of heat and chemicals from spent liquor | Tuomo Ruohola, Erik Saiha, Paavo Hyoty | 1992-05-12 |