Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4296044 | Process for the preparation of cationic anthraquinone dyestuffs | Gunter Gehrke | 1981-10-20 |
| 4268267 | Phthalocyanine reactive dyestuffs | Manfred Groll, Klaus Wunderlich | 1981-05-19 |