Aqueous coating dispersions

Patent 4737357 Issued on April 12, 1988. Estimated Expiration Date:

May 29, 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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3520970

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Inventors

Application

No. 07/056291 filed on 05/29/1987

US Classes:

424/487, Acrylic acid and derivatives424/497, Containing solid synthetic polymers524/547, From reactant-containing atom other than O, N, C, halogen, or hydrogen524/555, From nitrogen-containing monomer other than acrylonitrile or methacrylonitrile526/287, From monomer containing three or more oxygen atoms bonded to a single sulfur atom, e.g., sulfonate, etc.526/292.2, Contains nitrogen526/292.95Halogen monomer contains a carboxylic acid, salt, or carboxylic acid amide

Examiners

Primary: Michl, Paul R.
Assistant: Doody, Patrick A.

Attorney, Agent or Firm

Curtis, Morris & Safford

International Classes

A61K 9/20 (20060101)
A61K 9/16 (20060101)
A61K 9/70 (20060101)
A61K 9/28 (20060101)
A61K 9/50 (20060101)
C08J 3/02 (20060101)
C08J 3/05 (20060101)

Foreign Application Priority Data

1984-10-19 DE

Abstract

Aqueous dispersions of a water-swellable but water-insoluble polymer formed between a quaternary ammonium monomer and a nonionic monomer; methods for making such dispersions by dispersing said copolymers, in the form of a powder, in water; methods for coating pharmaceutical cores, powders, or granules with such dispersions; and coated pharmaceutical products made by such methods.