Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4760132 | Process for preparing cationic hydrazone dyestuffs | Dietmar Kalz, Volker Huhne, Roderich Raue | 1988-07-26 |
| 4277396 | Thiazolediazacyanine dyestuffs | Karl H. Hermann | 1981-07-07 |
| 4247470 | Process for isolating triarylmethane dyestuffs | Karl H. Hermann | 1981-01-27 |
| 4211716 | Process for isolating triarylmethane dyestuffs | Karl H. Hermann | 1980-07-08 |