Biodegradable polymer substrates loaded with active substance suitable for the controlled release of the active substance by means of a membrane
US4965128A · kind A · utility
31Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1988 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Feb 26, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2975
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Biodegradable hollow fibres with an asymmetric wall, the cavity of which containing an active substance like a drug, hormone etc. or a dilute form of the latter and both ends of the hollow fibre being closed for the controlled release of the active substance as well as a process for the manufacturing of such hollow fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.