Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6841036 | Process for the oxygen delignification of pulp in two stages with higher pressure in the second stage | Martin Ragnar | 2005-01-11 |
| 6808596 | System for the oxygen delignification of pulp consisting of lignocellulose-containing material | Martin Ragnar | 2004-10-26 |
| 6605181 | Peroxide bleach sequence including an acidic bleach stage and including a wash stage | Anders Bergqvist, Marcelo Moreira Leite | 2003-08-12 |
| 6391152 | Process for the oxygen delignification of pulp in two stages with higher pressure in the second stage | Martin Ragnar | 2002-05-21 |
| 6315862 | Process for bleaching pulp with adsorption of metals | Anders Bergovist | 2001-11-13 |
| 5462641 | Process for bleaching pulp with adsorption of metals | Anders Bergvist | 1995-10-31 |
| 5366288 | Apparatus for mixing a suspension of cellulosic fibrous material and fluid | Rolf Ekholm, Ulf Jansson | 1994-11-22 |