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Generated: April 24, 2017

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Details for Patent: 6,004,582

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Summary for Patent: 6,004,582

Title: Multi-layered osmotic device
Abstract:The present invention provides a simple and improved multi-layered osmotic device (1) that is capable of delivering a first active agent in an outer lamina (2) to one environment of use and a second active agent in the core (5) to another environment of use. Particular embodiments of the invention provide osmotic devices in which the first and second active agents are similar or dissimilar. An erodible polymer coat (3) between an internal semipermeable membrane (4) and a second active agent-containing external coat (2) comprises poly(vinylpyrrolidone)-(vinyl acetate) copolymer. This particular erodible polymer results in an improved multi-layered osmotic device possessing advantages over related devices known in the art. The active agent in the core (5) is delivered through a pore (6) containing an erodible plug (7). The osmotic device (1) can be coated by a final finish coat (8).
Inventor(s): Faour; Joaquina (Buenos Aires, AR), Mayorga; Jorge (Buenos Aires, AR)
Assignee: Laboratorios Phoenix U.S.A, Inc. (Buenos Aires, AR)
Application Number:09/086,871
Patent Claim Types:
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Delivery; Device; Formulation;

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International Patent Family for Patent: 6,004,582

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Brazil9802144► Subscribe
China1228020► Subscribe
Canada2261787► Subscribe
Germany69818607► Subscribe
China1158071► Subscribe
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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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