Indole derivatives for dyeing keratin materials
US5354870A · kind A · utility
6Cited by
9References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1992 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Apr 6, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D209/08
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention concerns 4-hydroxy-5-methoxyindole and 5-ethoxy-4-hydroxy-2-methylindole which are useful as dyes for dyeing keratin materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.