Process and kit for dyeing hair
US5279617A · kind A · utility
8Cited by
18References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1992 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Jul 13, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for dyeing hair by preparing and thereafter applying to the hair an aqueous reaction medium comprising a substituted dopa species and an oxidant which is a ferricyanide salt, said aqueous reaction medium further containing a buffer to maintain the pH in the range from 6 to 10 during the reaction, and removing said aqueous reaction medium from the hair within about one hour following its preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.