Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684139 | Direct disazo dyestuffs | Karin Hassenruck, Frank-Michael Stohr | 1997-11-04 |
| 5646257 | Azodyestuffs, their preparation and their use | Karin Hassenruck, Karl-Heinz Reinhardt, Klaus Wunderlich | 1997-07-08 |
| 5637679 | Azo dyestuffs for dyeing and printing cellulose-containing fiber materials in an ink jet process | Karin Hassenruck, Frank-Michael Stohr | 1997-06-10 |
| 5607502 | Dyestuffs for printing inks | Karin Hassenruck, Martin Michna | 1997-03-04 |