Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4451332 | Method for delignification of ligno-cellulose containing fiber material with an alkali-oxygen extraction stage | Goran E. Annergren, Tjell-Ake Hagglund, Lars-Ake Lindstrom, Lars E. Nasman | 1984-05-29 |