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|Title:||Osmotic device with hydrogel driving member|
|Abstract:||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.|
|Inventor(s):||Cortese; Richard (San Jose, CA), Theeuwes; Felix (Los Altos, CA)|
|Assignee:||ALZA Corporation (Palo Alto, CA)|
Patent Claim Types:|
see list of patent claims
|Delivery; Device; Formulation;|
|Country||Document Number||Estimated Expiration||Supplementary Protection Certificate||SPC Country||SPC Expiration|
|Germany||3172338||<disabled in preview>|
|European Patent Office||0052917||<disabled in preview>|
|Austria||15606||<disabled in preview>|
| This preview shows a limited data set|
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.
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