Compositions and methods employing liposomes including tyrosine or a tyrosine derivative
US5290562A · kind A · utility
11Cited by
16References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1991 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Nov 7, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2984
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Compositions, for example cosmetic or pharmaceutical compositions, and methods of increasing melanin formation on the skin or scalp employ liposomes including between 0.001 and 10 weight percent, with respect to the total weight of the composition, of tyrosine or a tyrosine derivative selected from the group consisting of an alkali metal salt of L-tyrosine, an alkaline earth metal salt of L-tyrosine, methyl L-tyrosinate, ethyl L-tyrosinate, and stearyl L-tyrosinate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.