Constant release system with pulsed release

Patent 4777049 Issued on October 11, 1988. Estimated Expiration Date:

January 8, 2007. 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. 07/001599 filed on 01/08/1987

US Classes:

424/457, Sustained or differential release424/468, Sustained or differential release type604/892.1Osmotic or diffusion pumped device or system

Examiners

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

Attorney, Agent or Firm

International Classes

A61K 9/00 (20060101)
A61M 31/00 (20060101)

Abstract

An osmotic delivery system is disclosed for delivering a useful agent at a controlled and constant rate modulated by a pulsed delivery of the useful agent to an environment of use.