Title:
VALVE FOR OSMOTIC DEVICES
Document Type and Number:
WIPO Patent Application WO2001045675
Kind Code:
A3
Abstract:
An osmotic delivery system for controlled delivery of a beneficial agent includes an implant capsule having a beneficial agent reservoir, an osmotic agent which expands on contact with fluid imbibed through a permeable membrane retained by the implant capsule, a delivery port, and a valve for opening and closing the delivery port. When the osmotic agent expands, a pressure is exerted against a separating member positioned between the beneficial agent reservoir and the osmotic agent. The separating member moves within the capsule, thereby forcing the valve to move a distance such that the beneficial agent can exit the reservoir through the delivery port.
Inventors:
CARR JOHN P
ECKENHOFF JAMES B DI
ECKENHOFF JAMES B DI
Application Number:
PCT/US2000/034314
Publication Date:
January 03, 2002
Filing Date:
December 13, 2000
Export Citation:
Assignee:
ALZA CORP (US)
DENNIS BONNIE BURDETT LF (FR)
DENNIS BONNIE BURDETT LF (FR)
International Classes:
A61K9/00; A61K9/22; A61K9/52; (IPC1-7): A61K9/22
Domestic Patent References:
| WO1998042317A2 | 1998-10-01 |
Foreign References:
| US5498255A | 1996-03-12 | |||
| EP0627231A2 | 1994-12-07 |
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