Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5128454 | .beta.-modified crystalline fed monoazo pigment | — | 1992-07-07 |
| 4987221 | Bisdiazonium salts of 4,4'-diamino-3,3'-dialkoxybiphenyls and a process for their preparation | Hasso Hertel, Klaus Hunger | 1991-01-22 |
| 4987258 | 4,4'-diaminodiphenyl compounds, process for their preparation and their use | Klaus Hunger, Kurt Habig | 1991-01-22 |
| 4696675 | Process for preparing water-insoluble blue azo dyes on the fiber: hydroxynaphthoic amide and diazotized di-alkoxy-benzidine | Hasso Hertel, Klaus Hunger | 1987-09-29 |
| 4665163 | Diaryl pigments with improved heat stability obtained by coupling bis-diazotized diamines with acetoacetanilides | Klaus Hunger, Hans-Joachim Lenz | 1987-05-12 |
| 4251441 | Pigments of mixtures of methoxynitrobenzene-azo-methoxy-acetanilides | Klaus Hunger | 1981-02-17 |