Dosage form for time-varying patterns of drug delivery

Patent 5232705 Issued on August 3, 1993. Estimated Expiration Date:

April 1, 2012. 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

Application

No. 864824 filed on 04/01/1992

US Classes:

424/473, With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)424/468, Sustained or differential release type424/472Layered unitary dosage forms

Examiners

Primary: Page, Thurman K.
Assistant: Horne, Leon R.

Attorney, Agent or Firm

Sabatine; Paul L., Larson; Jacqueline S., Mandell; Edward L.

International Class

A61K 009/24

Abstract

A dosage form is disclosed that comprises means inside the dosage form for providing a substantially drug-free interval before the dosage form delivers a drug from inside the dosage form. The dosage form in an embodiment comprises a drug on the exterior of the dosage form, which drug is available for immediate delivery.