Issued Patents All Time
Showing 26–50 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5607545 | Ozone bleaching process utilizing a fluidizing mixer and super-atmospheric pressure | Brian F. Greenwood | 1997-03-04 |
| 5575395 | Method and apparatus for screening fibrous suspensions | Timo Alajaaski, Kalevi Laakso, Antero Laine, Risto Ljokkoi, Olavi Pikka +2 more | 1996-11-19 |
| 5567274 | Method of controlling pressurized ozone to a pulp delignification reactor | Erwin D. Funk, Stephen J. Dunn | 1996-10-22 |
| 5518582 | Method of affecting the sulphur content and/or sulphur compound composition of a melt in a recovery boiler | Anja Klarin | 1996-05-21 |
| 5411634 | Medium consistency ozone bleaching | Joseph R. Phillips, Brian F. Greenwood, Erwin D. Funk, Stephen J. Dunne | 1995-05-02 |
| 5403442 | Method of deaerating and pumping a fiber suspension prior to washing | Raimo Pitkanen | 1995-04-04 |
| 5364505 | Pressurized ozone pulp delignification reactor and a compressor for supplying ozone to the reactor | Erwin D. Funk, Stephen J. Dunn | 1994-11-15 |
| 5360514 | Treatment of bleach plant filtrations using a magnesium filter | Anja Klarin | 1994-11-01 |
| 5346591 | Apparatus for treatment of chips with heated black liquor | — | 1994-09-13 |
| 5340440 | Method for recovering chemicals using recovery boiler having at least 2 different melt sections | — | 1994-08-23 |
| 5328563 | Method of treating material containing sodium sulphate and/or sodium carbonate in a pulp mill | Anja Klarin | 1994-07-12 |
| 5326433 | Multi-level sulfide content white liquor production and utilization in cellulose pulping | Rolf Ryham, James W. Smith, Jian E. Jiang | 1994-07-05 |
| 5324166 | Apparatus and method for pumping a liquid | Jorma Elonen, Heikki Manninen | 1994-06-28 |
| 5323914 | Method of and apparatus for separating heavy impurities from fiber suspensions in connection with pumping | Raimo Pitkanen, Pentti Vikio | 1994-06-28 |
| 5267655 | Method and apparatus for treating a gas containing aqueous fiber suspension | Jukka Heino, Pasi Immonen, Raimo Kohonen, Erikki Savolainen, Pentti Vikio | 1993-12-07 |
| 5266160 | Method of an apparatus for treating pulp | Toivo Niskanen | 1993-11-30 |
| 5240621 | Method and apparatus for improving flotation separation | Jorma Elonen, Harry Erlund, Pasi Immonen, Raimo Kohonen, Heikki Manninen +3 more | 1993-08-31 |
| 5234480 | Method and apparatus for decreasing problems caused by residual or reaction gases or gases harmful to a process | Raimo Pitkanen | 1993-08-10 |
| 5221434 | Method for treating fiber suspensions | — | 1993-06-22 |
| 5219472 | Method of treating a fiber suspension | Jorma Elonen, Olavi Pikka, Raimo Pitkanen | 1993-06-15 |
| 5213662 | Treatment of chips with high temperature black liquor to reduce black liquor viscosity | — | 1993-05-25 |
| 5203963 | Continuous treatment of small chips | — | 1993-04-20 |
| 5203968 | Apparatus for treating fiber suspensions having rotatable liquid permeable treatment ducts | — | 1993-04-20 |
| 5156750 | Method and apparatus for thickening a fiber suspension and removing fine particles therefrom | Mika P. Makela, Toivo Niskanen, Olavi Pikka, Vesa Vikman | 1992-10-20 |
| 5147504 | Apparatus for treating pulp in a pressurized state | Olavi Pikka | 1992-09-15 |