Sustained delivery of an active agent using an implantable system
US6635268B2 · kind B2 · utility
97Cited by
15References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2002 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Apr 27, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- 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.