Stabilized liposomes
US5962015A · kind A · utility
25Cited by
10References
25Claims
0Family size
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Key dates
| Filing date | May 2, 1997 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | May 2, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/1273
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Lecithin-type liposomes are stabilized with quaternized alkyated polymers, such as steardimonium hydroxyethylcellulose, to provide excellent stability for cosmetic and pharmaceutical formulations. Temperature, storage, solvent, and acidity stability are described. The stabilized liposomes can serve as vectors for alpha-hydroxy acids and showed no aggregation even after 4 months of storage at pH 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.