Sustained delivery of an active agent using an implantable system
US6156331A · kind A · utility
86Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1999 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | May 12, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K38/09
- 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.