Color modified melanins and methods for their preparation and use
US5188844A · kind A · utility
8Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1992 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | May 7, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q19/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Color modified melanin compositions are produced by exposure of a natural or synthetic melanin starting material to a color modifying agent under controlled conditions. By treating the melanin starting materials for a preselected time period, melanin products having a desired final color may be obtained. The color modified melanin may be employed in a variety of cosmetic and other topically applied formulations. Prior to incorporation in such formulations, the color modified melanins will be cleaned to remove the color modifying agent and low molecular weight degradation products of the melanin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.