Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6258131 | Process for preserving the dyeing capacity of 5, 6-dihydroxyindole and of its and derivatives in an aqueous medium, composition and dyeing process | Jean F. Grollier, Jean Cotteret, Arnaud De Labbey | 2001-07-10 |
| 5478360 | Process for preserving the dyeing capacity of 5, 6-dihydroxyindole and of its derivatives in an aqueous medium, composition and dyeing process | Jean F. Grollier, Jean Cotteret, Arnaud De Labbey | 1995-12-26 |