Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5628872 | Method for bleaching pulp with hydrogen peroxide recovered from cellulosic spent liquor | Lars Stigsson, Ove Wallergard | 1997-05-13 |
| 5591303 | Process for operating a digester | Finn Oulie, Johanna Svanberg | 1997-01-07 |