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, Manfred Sponheimer, Manfred Ziegelmayer | 2000-02-08 |
| 5921479 | Process and apparatus for simultaneously grinding and drying material to be ground containing moist cellulose ether | Reinhard Doenges, Manfred Sponheimer, Manfred Ziegelmayer | 1999-07-13 |
| 5589589 | Process for screening cellulose ethers | Manfred Sponheimer, Manfred Ziegelmayer | 1996-12-31 |
| 4985152 | Process for separating solvents used in the purification of products | Josef Hilbig, Manfred Ziegelmayer | 1991-01-15 |