Delayed drug-releasing microspheres
US5993855A · kind A · utility
147Cited by
0References
11Claims
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Key dates
| Filing date | Sep 18, 1996 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Sep 18, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P9/08
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Microspheres prepared by emulsifying an aqueous phase containing a drug and an oil phase containing a biodegradable polymer to form a W/O emulsion, and then mixing and agitating this emulsion with another aqueous phase constituting a continuous phase to form a W/O/W emulsion. These microspheres can release a major portion of the drug after a predetermined period of time has elapsed after their administration to the patient, and are especially suitable for intracerebral implantation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.