Controlled release device with an impermeable coating having an orifice for release of drug
US5004614A · kind A · utility
103Cited by
33References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1989 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Aug 25, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/0004
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Controlled release devices having a core including an active agent and an outer coating which is substantially impermeable to the entrance of an environmental fluid and substantially impermeable to the release of the active agent during a dispensing period allow the controlled release of the active agent through an orifice in the outer coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.