Osmotic device with self-sealing passageway
US4627971A · kind A · utility
72Cited by
8References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Apr 22, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/0004
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An osmotic dispensing device is disclosed for delivering a medicine to a biological environment of use. The device comprises a semipermeable wall surrounding a compartment comprising a first layer comprising a beneficial agent formulation and a first passageway in the wall for delivering the beneficial agent formulation from the device, and a second layer of a composition comprising a hydrogel and a means for closing a second passageway formed during the manufacture of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.