Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4346204 | Copolymers containing hydroxyl groups, method of production and their application in sizing of paper | Felix Schulde, Klaus Diedrich | 1982-08-24 |
| 4200559 | Anionic paper surface sizing agent | Felix Schulde, Klaus Diedrich, Volker Kulisch | 1980-04-29 |