Process and kit for dyeing hair
US5279618A · kind A · utility
16Cited by
18References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1992 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Jul 31, 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 dopa and an oxidant, said aqueous reaction medium further containing at least one hair dyeing agent selected from the group consisting of primary intermediates and couplers and also 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.