Use of hydroxylated indoles as dye precursors
US4776857A · kind A · utility
35Cited by
8References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1986 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Nov 21, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention concerns a new system to dye hair and/or skin. The system comprises the use of a hydroxyindole dye precursor and sodium periodate. Advantageously, this dye system allows the dye to penetrate inside the hair fiber without coating the hair shaft and, thus, give a more pleasing and stable dye result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.