Cosmetic material containing triple- encapsulated retinol
US6908625B2 · kind B2 · utility
12Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2001 |
| Grant date | Jun 21, 2005 |
| Priority date | — |
| Expiry date | Aug 11, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/52
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention concerns stabilized cosmetic material containing triple-encapsulated retinol. Unstable, fat-soluble retinol is stabilized firstly by addition into vesicles consisting of nonionic surface-active agent, cholesterol and cholesteryl ester. The firstly stabilized retinol(vesicle) is subsequently inserted into sphingosomes (a kind of multi lamellar liposome) consisting of lecithin and ceramide. Finally the double-encapsulated retinol (sphingosome) is inserted into lamellar liquid-crystal emulsifying base, thereby being triply encapsulated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.