Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4760132 | Process for preparing cationic hydrazone dyestuffs | Hans-Lothar Dorsch, Dietmar Kalz, Roderich Raue | 1988-07-26 |
| 4513142 | Preparation of cationic methine dyestuffs | Roderich Raue, Hans-Peter Kuhlthau | 1985-04-23 |
| 4235773 | Trisazo dyestuffs containing a naphtholamino sulfonic acid component and a phenylcarbonylamino-phenyl component | Carl Taube, Reiner Ditzer | 1980-11-25 |