Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5133946 | Process for bleaching cellulosic materials and plant for carrying out the process | — | 1992-07-28 |
| 5100521 | Process and an arrangement for preparing ozonic gases and solutions | — | 1992-03-31 |
| 4834837 | Method for delignification of cellulose with oxygen | Heinz Loquenz, Siegfried Meissl, Helmut Schweiger, Norbert Meindl, Anton Hruschka | 1989-05-30 |