Issued Patents All Time
Showing 51–64 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5139671 | Apparatus for treating pulp | Seppo K. Kokkonen, Olavi Pikka, Harri Qvintus, Erkki A. Ruuskanen, Erkki Savolainen | 1992-08-18 |
| 5120398 | Arrangement for discharging pulp from a pulp treatment apparatus | Olavi Pikka, Toivo Niskanen, Jukka Timperi | 1992-06-09 |
| 5112444 | Method for treating pulp | Olavi Pikka | 1992-05-12 |
| 4975204 | Method and apparatus for thickening fiber suspension | Mika P. Makela, Toivo Niskanen, Olavi Pikka, Vesa Vikman | 1990-12-04 |
| 4971658 | Method of intensifying the washing of a fiber suspension | Olavi Pikka, Aki Vilpponen, Nils-Erik Virkola | 1990-11-20 |
| 4952314 | Apparatus for treating pulp | Seppo K. Kokkonen, Olavi Pikka, Harri Qvintus, Erkki A. Ruuskanen, Erkki Savolainen | 1990-08-28 |
| 4944840 | Method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose | — | 1990-07-31 |
| 4934281 | Circulating fluidized bed reactor and a method of separating solid material from flue gases | Folke Engstrom, Ragnar G. Lundqvist | 1990-06-19 |
| 4927529 | Method and apparatus for separating knots | Erkki T. Repo, Hannu Ronkonharju | 1990-05-22 |
| 4904395 | Method and apparatus for thickening fiber suspension | — | 1990-02-27 |
| 4729837 | Method and apparatus for thickening a suspension | — | 1988-03-08 |
| 4619736 | Apparatus for defiberizing, screening and pumping cellulose pulp or recycled paper | Pekka PELTOLA | 1986-10-28 |
| 4485646 | Apparatus for washing fiber stock | — | 1984-12-04 |
| 4333800 | Method for the recovery of easily evaporable components from hot gases | — | 1982-06-08 |