Osmotic system with instant drug availability

Patent 4673405 Issued on June 16, 1987. Estimated Expiration Date:

January 8, 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

2099402

2921001

3577512

3625214

Osmotic system with laminated wall comprising structurally different semipermeable lamina
Patent #: 4116241
Issued on: 09/26/1978
Inventor: Theeuwes , et al.

Nitrofurantoin sustained release tablet
Patent #: 4122157
Issued on: 10/24/1978
Inventor: Huber

Erodible agent releasing device comprising poly(orthoesters) and poly(orthocarbonates)
Patent #: 4138344
Issued on: 02/06/1979
Inventor: Choi , et al.

Osmotic releasing system with means for changing release therefrom
Patent #: 4142526
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Inventor: Zaffaroni , et al.

Prolonged-action multiple-layer tablets
Patent #: 4454108
Issued on: 06/12/1984
Inventor: Iida , et al.

Osmotic device for dispensing two different medications Patent #: 4455143
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Inventor: Theeuwes , et al.

Inventors

Application

No. 06/817211 filed on 01/08/1986

US Classes:

424/473, With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)424/467Printed, embossed, grooved, or perforated

Examiners

Primary: Rosenbaum, C. Fred
Assistant: Vinyard, Sherri E.

Attorney, Agent or Firm

International Class

A61K 9/00 (20060101)

Abstract

An osmotic device is disclosed for delivering a beneficial agent. The device comprises a wall surrounding a compartment containing drug, a passageway in the wall connecting the exterior of the device with the compartment, and drug in the wall. The device delivers the drug from the compartment and the wall.