Osmotic device with dual thermodynamic activity
US4612008A · kind A · utility
476Cited by
5References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1984 |
| Grant date | Sep 16, 1986 |
| Priority date | — |
| Expiry date | Dec 21, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/0004
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An osmotic system is disclosed comprising a wall formed in at least a part of a semipermeable material that surrounds a compartment. The compartment contains a first osmotic composition comprising a beneficial agent, and a second and different osmotic composition. A passageway in the wall connects the first composition with the exterior of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.