Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4773915 | Benzisothiazole azo dye for synthetic fibers | Klaus Leverenz, Hans Otten | 1988-09-27 |
| 4681932 | Benzoisothiazole azo dyestuffs | Klaus Leverenz, Hans Otten | 1987-07-21 |
| 4497736 | Azo dyestuffs | Karl H. Schundehutte | 1985-02-05 |
| 4391606 | Azo polyether dyestuffs, formulations of these dyestuffs, their preparation and their use | Karl H. Schundehutte, Volker Hederich | 1983-07-05 |
| 4377390 | Acetoacetic arylide azo dyestuffs for synthetic materials, especially polyester | Karl H. Schundehutte, Henning Reel | 1983-03-22 |
| 4342683 | Azo dyes with carboxyl polyalkyleneoxy chain moiety | Henning Reel, Karl H. Schundehutte | 1982-08-03 |
| 4292239 | Benzisothiazole azo dyestuffs containing polyether groups | Karl H. Schundehutte | 1981-09-29 |
| 4268439 | Basic azo dyestuffs having benzylammoniumamine substituent in the coupling component | — | 1981-05-19 |
| 4249902 | Dyestuff formulations | Karl H. Schundehutte | 1981-02-10 |
| 4235598 | Azo dyestuffs containing a naphthalic imide coupler and polyether groups | Henning Reel, Karl H. Schuadehutte | 1980-11-25 |
| 4222947 | Anthrachinone dyestuffs | Volker Hederich, Karl H. Schundehutte | 1980-09-16 |
| 4212803 | Cationic azo dyestuffs containing oxyalkylene substituent | — | 1980-07-15 |