04327725 is referenced by 962 patents and cites 5 patents.

An osmotic device is disclosed comprising a semipermeable wall surrounding a compartment housing an agent that is insoluble to very soluble in aqueous and biological fluids, and a layer of a fluid swellable, hydrogel. A passageway in the wall connects the agent with the exterior of the device.

Title
Osmotic device with hydrogel driving member
Application Number
6/210176
Publication Number
4327725
Application Date
November 25, 1980
Publication Date
May 4, 1982
Inventor
Felix Theeuwes
Los Altos
CA, US
Richard Cortese
San Jose
CA, US
Agent
Edward L Mandell
Paul L Sabatine
Assignee
ALZA Corporation
CA, US
IPC
A61M 7/00
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