Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11634864 | Method and a system for adjusting S/Na-balance of a pulp mill | Risto Hämäläinen | 2023-04-25 |
| 11619000 | Method and a system for adjusting S/Na-balance of a pulp mill | Risto Hämäläinen | 2023-04-04 |
| 10465339 | System and a method for producing aqueous sulphuric acid | Asta Humalajoki, Antti Vaeljae, Heikki Airikkala, Peter Bjoerklund | 2019-11-05 |
| 8349055 | Method and scrubber for scrubbing flue gas flows | Pekka Kaisko, Heikki Airikkala, Tarja Korhonen | 2013-01-08 |
| 7976809 | Method and an equipment for reducing the sulphur dioxide emissions of a marine engine | Mikko Anttila, Risto Hämäläinen | 2011-07-12 |
| 7910079 | Method and an apparatus for removing carbon dioxide from sulphur dioxide containing flue gases | Mikko Anttila, Risto Hämäläinen | 2011-03-22 |
| 6517793 | Method of reducing Nox compounds in flue gases of recovery boiler | Ari Tamminen, Risto Hämäläinen | 2003-02-11 |
| 5639434 | Process for removing nitrogen oxides from the flue gases of a pulp mill | Tapio Patrikainen, Ari Tamminen, Esa Pikkujamsa, 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 | Esa Pikkujamsa, Keijo Imelainen, Pauli Harila, Veli-Antti Kivilinna, Ahti Klami | 1996-10-08 |
| 5002743 | Process for the removal of sulfur dioxide from hot flue gases | Kari Kokkonen, Hannu Alppi, Timo Kenakkala | 1991-03-26 |
| 4891170 | Nozzle Assembly | Kari Kokkonen, Martti Lethimaki, Hannu Alppi | 1990-01-02 |