Synthesis of quarternary melanin compounds and their use as hair dyes or for skin treatment
US5827330A · kind A · utility
4Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1997 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Jun 13, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/065
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Water soluble, cationic products useful as hair colorants or for the treatment of skin which are esters or amides formed by reaction of melanin and a quaternary salt containing a reactive amino or hydroxyl group, as well as compositions containing them and methods of using such products to color hair or treat skin are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.