Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4992589 | Substituted phenyl hydroxyethyl sulfones, and process for their preparation | Hermann Fuchs, Theodor Papenfuhs, Werner Brodt | 1991-02-12 |
| 4906738 | Water-soluble phenyl- or naphthyl-azo-carboxypyrazolone compounds, containing a fiber-reactive group with a chloratriazinyl moiety and a group of the vinylsulfone series in the pyrazolone coupling component, suitable as dyestuffs | Fritz Meininger, Hans H. Steuernagel | 1990-03-06 |
| 4778911 | Process for preparation of 3-(acyl)amino-4-alkoxy-phenyl-.beta.-hydroxyethyl-sulfone (sulfonates) | Peter Hess, Theodor Papenfuhs | 1988-10-18 |
| 4492654 | Water-soluble azo compounds, a process for their preparation and their use as dyes | Ernst Hoyer, Fritz Meininger | 1985-01-08 |