Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888027 | Process for dyeing keratinous fibers with 5,6-dihydroxyindole in combination with an iodide and a hydrogen peroxide composition at alkaline pH | Jean F. Grollier | 1989-12-19 |
| 4885006 | Process for dyeing keratinous fibres with indole derivatives combined with an iodide | Jean F. Grollier | 1989-12-05 |
| 4808190 | Process for dyeing keratinous fibres with 5,6-dihydroxy-indole and hydrogen peroxide, preceded or followed by a treatment with an iodide | Jean F. Grollier | 1989-02-28 |
| 4804385 | Process for dyeing keratinous fibres with 5,6-dihydroxy-indole combined with an iodide and dyeing composition employed | Jean F. Grollier | 1989-02-14 |