Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5145557 | Chlorine-free bleaching method for dissolving-grade pulps using an OP-Z-P sequence | Walter H. Peter, Oskar Hoglinger | 1992-09-08 |
| 4834837 | Method for delignification of cellulose with oxygen | Heinz Loquenz, Siegfried Meissl, Helmut Schweiger, Norbert Meindl, Karl Schwarzl | 1989-05-30 |