Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4377390 | Acetoacetic arylide azo dyestuffs for synthetic materials, especially polyester | Karl H. Schundehutte, Winfried Kruckenberg | 1983-03-22 |
| 4342683 | Azo dyes with carboxyl polyalkyleneoxy chain moiety | Winfried Kruckenberg, Karl H. Schundehutte | 1982-08-03 |
| 4329283 | Hydroxypyridone azo dyestuffs | Klaus Leverenz | 1982-05-11 |
| 4249275 | Process for dyeing and printing cellulose fibres | Herbert Hugl, Gerhard Wolfrum, Werner Kunnel, Robert Kuth, Wilhelm Gohrbandt | 1981-02-10 |
| 4235598 | Azo dyestuffs containing a naphthalic imide coupler and polyether groups | Winfried Kruckenberg, Karl H. Schuadehutte | 1980-11-25 |