Sustained delivery of an active agent using an implantable system
US5985305A · kind A · utility
241Cited by
12References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Oct 2, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2206/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention is directed to a device for delivering an active agent formulation for a predetermined administration period. An impermeable reservoir is divided into a water-swellable agent chamber and an active agent formulation chamber. Fluid from the environment is imbibed through a semipermeable plug into the water-swellable agent chamber and the active agent formulation is released through a back-diffusion regulating outlet. Delivery periods of up to 2 years are achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.