Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6021966 | Process and apparatus for simultaneously grinding and drying a material to be ground containing moist cellulose ether | Reinhard Doenges, Guenther Welt, Manfred Ziegelmayer | 2000-02-08 |
| 5921479 | Process and apparatus for simultaneously grinding and drying material to be ground containing moist cellulose ether | Reinhard Doenges, Guenther Welt, Manfred Ziegelmayer | 1999-07-13 |
| 5589589 | Process for screening cellulose ethers | Guenther Welt, Manfred Ziegelmayer | 1996-12-31 |
| 4979681 | Process for grinding and simultaneous drying of moist cellulose ether products | Reinhard Donges, Gunther Welt, Manfred Ziegelmayer | 1990-12-25 |