Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4468349 | Process for the preparation of solutions of cationic azo dyestuffs | Harald Gleinig, Gunther Boehmke, Kurt Breig | 1984-08-28 |
| 4432899 | Preparing concentrated azo dye solutions using nitrite salt as both coupling component and diazotizing agent | Harald Gleinig, Gunther Boehmke | 1984-02-21 |
| 4400321 | Process for the preparation of solutions of cationic polyazo dyestuffs | Harald Gleinig, Roderich Raue, Hans-Peter Kuhlthau | 1983-08-23 |
| 4348335 | Process for the partial reduction of polynitrated diaryl compounds | Dieter Pawellek, Harald Gleinig | 1982-09-07 |