Sustained-release preparation
US6264970A · kind A · utility
140Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1997 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Jun 24, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K47/593
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A sustained-release preparation comprising a bioactive substance having an acidic group and a biodegradable polymer having an optionally protected basic group which improves the rate of incorporation of the bioactive substance, suppresses its leakage early after administration, and exhibits constantly suppressed release for an extended period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.