Preparation method for biodegradable polymeric microspheres using solvent extraction and preparation method for microspheres for treating local inflammation using the same
US6149944A · kind A · utility
45Cited by
3References
2Claims
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Key dates
| Filing date | Aug 2, 1999 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Aug 2, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J3/16
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A preparation method for biodegradable polymeric microspheres using a solvent extraction method for biodegradable polymeric microspheres for treating a local inflammation disease using the same which are capable of effectively curing ozena such as sinusitis and a middle ear infection. Since a non-solvent of polymer is added into an outer aqueous phase in advance, the solidification of the polymer is implemented in a short time which, in turn, improves encapsulation of the therapeutic agent used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.