Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6458242 | Ozone bleaching process using oxalic acid addition | — | 2002-10-01 |
| 6454900 | Method for two-stage oxygen delignification of chemical pulp | Pia Mellander, Solveig Norden | 2002-09-24 |