Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4719293 | (2,5-diisopropoxycarbonylbenzene-azo-2-hydroxy-3-carbamoyl naphthalene) pigment | — | 1988-01-12 |
| 4689403 | Disazo pigment from condensation of carboxylic acid chloride with 2,5-dichloro-1,4-phenylene diamine | — | 1987-08-25 |
| 4392999 | Monoazo pigments containing hydroxynaphthoylamino benzimidazolone radical | Rolf Muller, Armand Roueche, Paul Muller | 1983-07-12 |
| 4229344 | Monazo pigments containing hydroxynaphthoylaminobenzimidazalone radical | Rolf Muller, Armand Roueche, Paul Muller | 1980-10-21 |