Bioresorbable-polymer microspheres of hydroxy acid polymer free from surfactant, their preparation and their application as a drug
US5662938A · kind A · utility
14Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1995 |
| Grant date | Sep 2, 1997 |
| Priority date | — |
| Expiry date | Jan 19, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Bioresorbable microspheres and a process for making microspheres are provided. The microspheres are made of poly(hydroxy acid) having a bimodal distribution; at least one poly(hydroxy acid) having molecular mass of at least 20,000 and at least one poly(hydroxy acid) having a molecular mass of less than 5,000. The microspheres may contain an active substance for gradual release into a biosystem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.