Method for preparing microspheres and microspheres produced thereby
US8697127B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | May 12, 2011 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | May 12, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P43/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a method for preparing microspheres and microspheres prepared thereby, more particularly to a method for preparing a polymeric microsphere, including preparing an emulsion including a polymer compound, a drug, a water-insoluble organic solvent and a dispersion solvent and adding to the prepared emulsion a base or an acid to remove the water-insoluble organic solvent from the emulsion, a polymeric microsphere prepared thereby, and a composition for drug delivery including the microsphere. According to the present invention, a drug-containing polymer microsphere may be prepared quickly and simply without the solvent evaporation or solvent extraction process, thereby reducing water consumption and minimizing wastewater generation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.