U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Divisible tablet having controlled and delayed release of the active substance

Patent 4353887 Issued on October 12, 1982. Estimated Expiration Date: Icon_subject August 11, 2000. 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.

Patent References

D89941

D91644

D98858

D201497

D202467

D216307

D224591

D228456

D229049

1836604

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Inventors

Assignee

Application

No. 06/177028 filed on 08/11/1980

US Classes:

424/467Printed, embossed, grooved, or perforated

Examiners

Primary: Rose, Shep K.

Attorney, Agent or Firm

International Classes

A61K 9/20 (20060101)
A61J 3/10 (20060101)

Foreign Application Priority Data

1979-08-16 CH

Abstract

Divisible tablet having controlled and delayed release of the active substance and consisting of a compact that is optionally provided with a coating and is formed by at least one active substance in an adjunct composition that effects a delayed and controlled release of the active substance and optionally one or more additional adjunct compositions that optionally contain active substances and are arranged in longitudinal layers, the compact being of an oblong shape in which the ratio of length to width to depth is approximately 2.5 to 5: approximately 0.9 to 2:1 and the width constitutes at most 2/3 of the length, and in which one or more relatively deep dividing grooves are present which run perpendicularly to the length and the depth and have a total depth constituting from approximately 1/3 to approximately 1/2 of the depth of the tablet, but are at least so deep that one fracture surface area multiplied by the number of possible fragments constitutes a maximum of 15% of the surface area of the undivided tablet, the base and top faces independently of one another are planar or are convexly curved about the longitudinal axis or about parallels to this axis, the side faces are planar, the end faces can be of any shape and edges are optionally bevelled or rounded.

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