Cross-linked gels of hyaluronic acid and products containing such gels

Patent 4582865 Issued on April 15, 1986. Estimated Expiration Date:

December 6, 2004. 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

3357784

Ultrapure hyaluronic acid and the use thereof
Patent #: 4141973
Issued on: 02/27/1979
Inventor: Balazs

Hyaluronate based compositions and cosmetic formulations containing same
Patent #: 4303676
Issued on: 12/01/1981
Inventor: Balazs

Polymeric articles modified with hyaluronate
Patent #: 4487865
Issued on: 12/11/1984
Inventor: Balazs , et al.

Hyaluronate modified polymeric articles Patent #: 4500676
Issued on: 02/19/1985
Inventor: Balazs , et al.

Inventors

Assignee

Biomatrix, Inc.

Application

No. 06/678895 filed on 12/06/1984

US Classes:

524/29, Atom other than O, H, C, S, or Group IA metal514/781, Cellulose or derivative524/27, Carbohydrate or derivative DNRM536/4.1O- or S- Glycosides

Examiners

Primary: Griffin, Ronald W.

Attorney, Agent or Firm

Palmer; Sheldon

International Classes

A61K 8/72 (20060101)
A61K 8/73 (20060101)
A61K 47/36 (20060101)
A61Q 19/00 (20060101)
C08B 37/00 (20060101)
C08B 37/08 (20060101)
C08F 8/34 (20060101)
C08F 8/00 (20060101)
C08L 5/08 (20060101)
C08L 5/00 (20060101)

Abstract

Disclosed are cross-linked gels of hyaluronic acid, alone or mixed with other hydrophilic polymers and containing various substances or covalently bonded low molecular weight substances and processes for preparing them. These products are useful in numerous applications including cosmetic formulations and as drug delivery systems.