Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889562 | Organic pigments coated with crosslinked ethyl cellulose | Philippe Bugnon | 1989-12-26 |
| 4880472 | Organic pigments coated with metal oxides | Philippe Bugnon, Arnold Grubenmann, Jean Schaefle | 1989-11-14 |
| 4865650 | Novel compositions based on tetrachloroisoindolinone pigments | Jost von der Crone, Philippe Bugnon | 1989-09-12 |
| 4808230 | Organic pigments coated with metal oxides fixed with ethyl cellulose | Philippe Bugnon | 1989-02-28 |