Method for producing free powder particles of polyamide impregnated with at least one cosmetic or pharmaceutical agent, and free powder particles of polyamide having a content of at least 25 WT % of a cosmetic or pharmaceutical agent other than water
US9764167B2 · kind B2 · utility
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31References
20Claims
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Key dates
| Filing date | Apr 16, 2010 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Apr 16, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/56
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a method for producing free powder particles of polyamide, impregnated with at least one cosmetic or pharmaceutical agent. The present invention also relates to free powder particles of polyamide having a content of at least 25% by weight of a cosmetic or pharmaceutical agent other than water, to the use of said particles in a cosmetic, pharmaceutical or perfumery products, and to compositions containing such particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.