Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5549788 | Minimal effluents discharge pulp mill with chemical recovery | Tuomo Nykanen, Brian F. Greenwood, Johan Gullichsen, Erkki Kiiskila, Esko Mattelmaki +4 more | 1996-08-27 |
| 5547543 | Apparatus for minimizing effluent discharges and recovering chemicals in a pulp mill | Tuomo Nykanen, Brian F. Greenwood, Johan Gullichsen, Erkki Kiiskila, Esko Mattelmaki +4 more | 1996-08-20 |
| 5518583 | Zero discharge mill distillation, salt recovery, and water management | Tuomo Nykanen, Brian F. Greenwood, Johan Gullichsen, Erkki Kiiskila, Esko Mattelmaki +4 more | 1996-05-21 |
| 5380402 | Reducing pulp mill liquid discharge | Rolf Ryham, Tuomo Nykanen, Brian F. Greenwood, Johan Gullichsen, Erkki Kiiskila +4 more | 1995-01-10 |
| 5374333 | Method for minimizing pulp mill effluents | Tuomo Nykanen, Brian F. Greenwood, Johan Gullichsen, Erkki Kiiskila, Esko Mattelmaki +4 more | 1994-12-20 |