Osmotic capsule

Patent 4627850 Issued on December 9, 1986. Estimated Expiration Date:

December 9, 2003. 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

Osmotic devices having composite walls
Patent #: 4077407
Issued on: 03/07/1978
Inventor: Theeuwes , et al.

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

Microporous-semipermeable laminated osmotic system
Patent #: 4256108
Issued on: 03/17/1981
Inventor: Theeuwes

Osmotic device with hydrogel driving member
Patent #: 4327725
Issued on: 05/04/1982
Inventor: Cortese , et al.

Laminate made of a cellulose acetate layer and an elastomeric material layer
Patent #: 4331728
Issued on: 05/25/1982
Inventor: Theeuwes

Dispenser constructed with semipermeable polymer-hydrophilic polymer wall
Patent #: 4455144
Issued on: 06/19/1984
Inventor: Michaels

Foam capsules Patent #: 4500358
Issued on: 02/19/1985
Inventor: Mayer , et al.

Inventors

Assignee

ALZA Corporation

Application

No. 06/548219 filed on 11/02/1983

US Classes:

604/892.1, Osmotic or diffusion pumped device or system210/500.28, Cyclic210/500.29, Cellulosic210/500.3, Cellulose acetate210/500.31, Cellulose diacetate210/500.32, Cellulose triacetate210/500.35, Acrylate210/500.38, Amide210/500.42, Vinyl424/452, With claimed designated perfecting feature in contents (e.g., excipient, lubricant, etc.)424/457, Sustained or differential release428/308.4, Void-containing component is synthetic resin or natural rubbers428/318.6, Of about the same composition as, and adjacent to, the void-containing component428/478.4, Next to cellulosic526/930WATER SWELLABLE OR HYDROPHILIC

Examiners

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

Attorney, Agent or Firm

International Class

A61K 9/00 (20060101)

Abstract

An osmotic capsule is disclosed for delivering a beneficial agent formulation to an environment of use. The osmotic capsule comprises an outer semipermeable wall surrounding and laminating an inner capsule wall formed of a different polymeric composition than the outer wall. The walls define an interior space containing the beneficial agent formulation. A passageway through the walls connects the exterior of the osmotic capsule with the interior of the osmotic capsule.