Osmotic implant with membrane and membrane retention means
US7163688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2002 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Dec 29, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/0004
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An osmotic delivery system for controlled delivery of a beneficial agent includes an implantable capsule containing a beneficial agent and an osmotic engine that swells on contact with water, thereby causing the release of the beneficial agent over time. The osmotic delivery system has a membrane material that allows a controlled amount of fluid to enter from an exterior of the capsule, while preventing the compositions within the capsule from passing out of the capsule. The osmotic delivery system is designed to meet at least the operating pressures of 1000 psi. The membrane material is cast, calendered or extruded followed by machining (i.e., die-cutting, stamping or otherwise cutting to shape) to provide a uniform nonribbed membrane material. The capsule also includes a membrane material-retaining means that is positioned at a fluid uptake end to retain the membrane material within the capsule, even under periods of high pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.