Osmotic device with wall comprising cellulose ether and permeability enhancer
US4519801A · kind A · utility
136Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1982 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Jul 12, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/0004
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An osmotic delivery system is disclosed for dispensing a useful agent. The system comprises a semipermeable wall surrounding a compartment housing the agent. The wall comprises a cellulose ether, an organic solvent soluble polymer, and optionally an aqueous soluble polymer. A passageway in the wall connects the interior of the system with the exterior for dispensing an agent from the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.