Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6475338 | Method of minimizing transition metal ions during chemical pulping in a digester by adding chelating agent to the digester | Kaj Henricson | 2002-11-05 |
| 5635026 | Cooking cellulose material with high alkali concentrations and/or high pH | Auvo Kettunen, Kaj Henricson, Aki Vilpponen, Bruno Marcoccia | 1997-06-03 |
| 5328564 | Modified digestion of paper pulp followed by ozone bleaching | Brian F. Greenwood, Joseph R. Phillips | 1994-07-12 |
| 5326433 | Multi-level sulfide content white liquor production and utilization in cellulose pulping | Rolf Ryham, James W. Smith, Kaj Henricson | 1994-07-05 |