Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5208325 | Cationic 1,3,4-thiadiazole dyestuffs | Horst Berneth | 1993-05-04 |
| 5102994 | Disperse azo dyestuffs containing a thiocyonate group | Manfred Hoppe | 1992-04-07 |
| 4835261 | Nonionic azo compounds in which the coupling component is a 3,4-dialkoxy aniline derivative | — | 1989-05-30 |
| 4810783 | Process for the preparation of azo dyestuffs having an aniline-type coupler by aminolysis of the appropriate ether group-containing compounds | — | 1989-03-07 |
| 4773915 | Benzisothiazole azo dye for synthetic fibers | Winfried Kruckenberg, Hans Otten | 1988-09-27 |
| 4722737 | Stable gamma-modification of a benzisothiazole azo dyestuff | Horst Brandt | 1988-02-02 |
| 4681932 | Benzoisothiazole azo dyestuffs | Winfried Kruckenberg, Hans Otten | 1987-07-21 |
| 4424156 | Halo-substituted amino-and substituted-sulphonamido-containing azo dyestuffs | Rainer Hamprecht | 1984-01-03 |
| 4329283 | Hydroxypyridone azo dyestuffs | Henning Reel | 1982-05-11 |
| 4250089 | Process for diazotizing aromatic amines | — | 1981-02-10 |
| 4237048 | Monoazo dyestuff containing di-cyano substituents ortho to the azo group | Alois Gottschlich | 1980-12-02 |