Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8815053 | Method of treating liquid flows at a chemical pulp mill | Janne Vehmaa, Pekka Tervola | 2014-08-26 |
| 8632655 | Method in connection with the washing of pulp at a chemical pulp mill | Janne Vehmaa, Pekka Tervola | 2014-01-21 |
| 8632656 | Method for treating liquid flows at a chemical pulp mill | Janne Vehmaa, Pekka Tervola | 2014-01-21 |
| 8632657 | Method for treating liquid flows at a chemical pulp mill | Janne Vehmaa, Pekka Tervola | 2014-01-21 |
| 8277608 | Method for treating pulp in connection with the bleaching of chemical pulp | Kaj Henricson, Pekka Tervola | 2012-10-02 |
| 8052839 | Apparatus and method for washing pulps | Pekka Tervola, Hannu Ronkonharju | 2011-11-08 |
| 7229527 | Method for the controlled thickening of low consistency fiber suspensions | Antero Laine, Risto Ljokkoi, Sami Siik, Harri Qvintus | 2007-06-12 |
| 6767432 | Apparatus for the thickening of fiber suspensions | Antero Laine, Risto Ljokkoi, Sami Siik, Harri Qvintus | 2004-07-27 |
| 6736934 | Method of pretreating pulp in an acid tower prior to bleaching with peroxide | Kaj Henricson | 2004-05-18 |
| 6733625 | Method and apparatus for treating pulp | Kaj Henricson, Eero Kontturi, Janne Vehmaa | 2004-05-11 |
| 6582601 | Method and apparatus for separating soap | Pasi Heinämäki, Hannu Ronkonharju, Janne Vehmaa | 2003-06-24 |
| 6514380 | Treatment of chemical pulp | Antero Laine | 2003-02-04 |
| 6375797 | Bleaching chemical pulp in a PkDQ-Po Sequence | Kaj Henricson | 2002-04-23 |
| 6136145 | Method for treating pulp in an indirect heat exchanger in connection with bleaching | Kaj Henricson | 2000-10-24 |
| 5800674 | Method and apparatus for improving a batch cooking process | Mauno Iivonen, Arto Koso, Seppo Pursiainen, Esko Turunen | 1998-09-01 |
| 5575395 | Method and apparatus for screening fibrous suspensions | Timo Alajaaski, Kaj Henricson, Kalevi Laakso, Antero Laine, Risto Ljokkoi +2 more | 1996-11-19 |
| 5571384 | Method and arrangement for the treatment of a fiber suspension | Hannu Ronkonharju | 1996-11-05 |
| 5470432 | Method and arrangement for the treatment of a fiber suspension | Hannu Ronkonharju | 1995-11-28 |
| 5219472 | Method of treating a fiber suspension | Jorma Elonen, Kaj Henricson, Raimo Pitkanen | 1993-06-15 |
| 5156750 | Method and apparatus for thickening a fiber suspension and removing fine particles therefrom | Kaj Henricson, Mika P. Makela, Toivo Niskanen, Vesa Vikman | 1992-10-20 |
| 5147504 | Apparatus for treating pulp in a pressurized state | Kaj Henricson | 1992-09-15 |
| 5139671 | Apparatus for treating pulp | Kaj Henricson, Seppo K. Kokkonen, Harri Qvintus, Erkki A. Ruuskanen, Erkki Savolainen | 1992-08-18 |
| 5120398 | Arrangement for discharging pulp from a pulp treatment apparatus | Kaj Henricson, Toivo Niskanen, Jukka Timperi | 1992-06-09 |
| 5112444 | Method for treating pulp | Kaj Henricson | 1992-05-12 |
| 4975204 | Method and apparatus for thickening fiber suspension | Kaj Henricson, Mika P. Makela, Toivo Niskanen, Vesa Vikman | 1990-12-04 |