Microspheres, process for their preparation and their use
US6120805A · kind A · utility
43Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1995 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | May 31, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5192
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Biocompatible microspheres containing one or more active principals, a biodegradable and biocompatible polymer and a surface-active agent which is also biodegradable and biocompatible, contain less than 10 ppm of heavy metals. These microspheres are prepared by providing a solution of the polymer and of the active principal in a water-immiscible solvent which is more volatile than water and mixing with an aqueous solution of the surface-active agent, followed by evaporation of the solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.