Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4931066 | Dyeing composition for keratinous fibres containing at least one co-solubilized n-substituted 2-nitro-para-phenylenediamine and process for dyeing keratinous fibres therewith | Jean F. Grollier, Jean Cotteret | 1990-06-05 |