Use of asymmetric membranes in delivery devices
US5612059A · kind A · utility
89Cited by
32References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1992 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Sep 25, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5042
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A device for controlled release of an active substance through one or more asymmetric membranes by diffusion and/or osmotic pumping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.