04207890 is referenced by 189 patents and cites 19 patents.

A drug-dispensing device and method for controlled and prolonged internal administration of medicaments to warm-blooded animals comprising an outer polymer envelope containing an expanding agent, drug metering means, and the drug itself. The outer polymer envelope is permeable to both the drug and body fluids and expands when the expanding agent is contacted by body fluids when the device is in the environment of use (e.g., the stomach). This expansion maintains the device in the environment of use while the drug is administered by the metering means.

Title
Drug-dispensing device and method
Application Number
756654
Publication Number
4207890
Application Date
September 21, 1978
Publication Date
June 17, 1980
Inventor
Ernest S Moyer
Grafton
WV, US
Ronald C Mamajek
Glenside
PA, US
Agent
Geoffrey G Dellenbaugh
Assignee
McNeilab
PA, US
IPC
A61D 7/00
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