Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4598151 | Cationic dyestuffs, a process for their preparation, and their use for dyeing and mass-coloring | Horst Harnisch | 1986-07-01 |
| 4542223 | Process for the preparation of cationic methine dyestuffs | Roderich Raue, Klaus-Friedrich Lehment | 1985-09-17 |
| 4542224 | Process for preparing cationic methine dyestuffs | Roderich Raue | 1985-09-17 |
| 4513142 | Preparation of cationic methine dyestuffs | Roderich Raue, Volker Huhne | 1985-04-23 |
| 4400321 | Process for the preparation of solutions of cationic polyazo dyestuffs | Karl Linhart, Harald Gleinig, Roderich Raue | 1983-08-23 |
| 4392998 | One pot diazotization, coupling and quaternization of aminotriazoles | — | 1983-07-12 |
| 4376728 | Process for the preparation of cationic alkylarylhydrazone dyestuffs and color bases thereof | Roderich Raue | 1983-03-15 |
| 4294756 | Cationic dyestuffs | — | 1981-10-13 |
| 4292238 | Alkylation of benzthiazole-azo-phenylamine dyestuffs | — | 1981-09-29 |
| 4252716 | Benzthiazolyl-azo-indole basic dyestuffs | — | 1981-02-24 |
| 4211436 | Pressure-sensitive recording material | Hubertus Psaar, Roderich Raue | 1980-07-08 |
| 4203722 | Transfer printing process with naphtholactam dyes | Alfred Brack | 1980-05-20 |
| 4185151 | Cationic dyestuffs | — | 1980-01-22 |