Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5179021 | Pulp bleaching process comprising oxygen delignification and xylanase enzyme treatment | Paul Dubelsten | 1993-01-12 |
| 5118389 | Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp | Paul Dubelsten, Christopher J. Kanters | 1992-06-02 |