Osmotic system comprising plurality of members for dispensing drug

Patent 4783337 Issued on November 8, 1988. Estimated Expiration Date:

September 29, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

ALZA Corporation

Application

No. 06/912712 filed on 09/29/1986

US Classes:

424/468, Sustained or differential release type424/469, Discrete particles in supporting matrix424/474, Coated pills or tablets424/486, Synthetic polymer428/320.2, Composite having a component wherein a constituent is liquid or is contained within preformed walls (e.g., impregnant-filled, previously void containing component, etc.)428/913, MATERIAL DESIGNED TO BE RESPONSIVE TO TEMPERATURE, LIGHT, MOISTURE, ETC.604/892.1Osmotic or diffusion pumped device or system

Examiners

Primary: Schofer, Joseph L.
Assistant: Teskin, F. M.

Attorney, Agent or Firm

International Class

A61K 9/00 (20060101)

Abstract

An osmotic system is disclosed comprising a wall comprising in at least a part of a semipermeable material that surrounds a compartment. The compartment contains a first osmotic composition comprising a beneficial drug selected from the group consisting of a calcium antagonist, angiotensin enzyme inhibitor and nonsteroidal antiinflammatory drugs, and a second and different osmotic composition. A passageway in the wall connects the first composition with the exterior of the system.