Osmotic dosage system for delivering a formulation comprising liquid carrier and drug

Patent 5324280 Issued on June 28, 1994. Estimated Expiration Date:

June 28, 2011. 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

3760805

Osmotic dispenser with means for dispensing active agent responsive to osmotic gradient
Patent #: 3995631
Issued on: 12/07/1976
Inventor: Higuchi , et al.

Enteric capsules
Patent #: 4138013
Issued on: 02/06/1979
Inventor: Okajima

Device for delivering drug to biological environment
Patent #: 4180073
Issued on: 12/25/1979
Inventor: Michaels

Device having variable volume chamber for dispensing useful agent
Patent #: 4203440
Issued on: 05/20/1980
Inventor: Theeuwes

Osmotically triggered device with gas generating means
Patent #: 4203441
Issued on: 05/20/1980
Inventor: Theeuwes

Device for delivering drug to a fluid environment
Patent #: 4203442
Issued on: 05/20/1980
Inventor: Michaels

Osmotic capsule
Patent #: 4627850
Issued on: 12/09/1986
Inventor: Deters , et al.

Osmotic device with inert core
Patent #: 4693886
Issued on: 09/15/1987
Inventor: Ayer

Dispenser for delivering thermo-responsive composition
Patent #: 4781714
Issued on: 11/01/1988
Inventor: Eckenhoff , et al.

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Inventors

Application

No. 502705 filed on 04/02/1990

US Classes:

604/892.1, Osmotic or diffusion pumped device or system424/453, Telescoping two piece424/463, Coated capsules424/468, Sustained or differential release type424/472Layered unitary dosage forms

Examiners

Primary: Rosenbaum, C. Fred
Assistant: Stright, Ronald K. Jr.

Attorney, Agent or Firm

Sabatine; Paul L., Duvall; Jean M., Harbin; Alisa A.

Foreign Patent References

2524311 FR 10/13/1983

International Class

A61K 009/22

Abstract

An osmotic system is disclosed for delivering a beneficial agent formulation to an environment of use. The osmotic system comprises (a) an outside semipermeable wall, (b) a middle osmotically active layer, (c) a capsule comprising a beneficial agent, and (d) a passageway for dispensing the beneficial agent from the osmotic system.