Highly bioadhesive and mucoadhesive compositions containing polyvinyl alcohol, polycarbophil and biopolymer for the treatment of skin conditions and as vehicles for active ingredients

Patent 5876744 Issued on March 2, 1999. Estimated Expiration Date:

April 22, 2017. 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

Bioadhesive compositions and methods of treatment therewith
Patent #: 4615697
Issued on: 10/07/1986
Inventor: Robinson

Calcium polycarbophil-alginate controlled release composition and method Patent #: 5110605
Issued on: 05/05/1992
Inventor: Acharya

Inventors

Assignee

Lifegroup S.p.A.

Application

No. 776537 filed on 04/22/1997

US Classes:

424/434Mucosal (e.g., nasal, etc.)

Examiners

Primary: Page, Thurman K.
Assistant: Howard, Sharon

Attorney, Agent or Firm

McDermott, Will & Emery

Foreign Patent References

0 280 807 EP. 09/13/1988
0 429 156 EP. 01/13/1990
0 393 904 EP. 10/13/1990
393904 EP. 10/13/1990
516026 EP. 12/13/1992
0 516 141 EP. 12/13/1992
0 516 026 EP. 12/13/1992
59-116207 JP. 10/13/1984
WO 90/10020 WO. 09/13/1990

International Class

A61F 013/00

Foreign Application Priority Data

1994-08-01 IT

Abstract

Compositions having high bioadhesion, mucoadhesion and visoelasticity, containing mixtures of synthetic polymers, such as polyvinyl alcohol and Polycarbophil, and of biopolymers, such as alginic acid, hyaluronic acid and dermatan sulfate, useful in the treatment of skin and mucosal tissues dryness and dehydration, and suitables as vehicles for active ingredients in percutaneous absorption.

Other References

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