Process for dyeing hair by the sequential treatment of hair with metal ion-containing composition and with a dye composition containing 5,6-dihydroxyindole-2-carboxylic acid and certain derivatives thereof
US5346509A · kind A · utility
8Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1993 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Apr 14, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/492
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Process for dyeing human hair by the sequential treatment of the hair with a metal ion and particularly transition metal ion containing composition and with a dye composition containing 5,6-dihydroxyindole-2-carboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.