US4629623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hyaluronate-poly (ethylene oxide) compositions and cosmetic formulations thereof
Assignee: Sanofi Biosurgery Inc
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Filing: 1984-06-11
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Granted: 1986-12-16
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Expires: 2004-06-11
Abstract
Abstract Disclosed are water based, viscoelastic compositions comprising a mixture of high molecular weights hyaluronic salts and water soluble poly(ethylene oxides). Also disclosed are cosmetic formulations including said compositions.
Inventors
- 👤 Endre A. Balazs
- 👤 Adolf Leshchiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/73; A61K8/735; A61K8/84; A61K8/86; A61P; A61P27/00; A61P27/02; A61Q; A61Q19/00; A61Q9/00; A61Q9/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
In a water based viscoelastic composition comprising a mixture of a hyaluronate and a polymer in water, the improvement wherein the hyaluronate has a molecular weight of about 1-5 million and the polymer is a water-soluble poly(ehylene oxide), which is a linear homopolymer of ethylene oxide having a molecular weight of about 1-5 million; the concentration of each component of the mixture being about 0.01% to about 2% and the ratio by weight of the hyaluronate to the poly(ethylene oxide) being about 1:50 to 100:1.
Claim 2
Dependent Claim
85 words
In a water based viscoelastic composition comprising a mixture of a hyaluronate and a polymer in water, the improvement wherein the hyaluronate has a molecular weight of about 1-5 million and the polymer is a water-soluble poly(ehylene oxide), which is a linear homopolymer of ethylene oxide having a molecular weight of about 1-5 million; the concentration of each component of the mixture being about 0.01% to about 2% and the ratio by weight of the hyaluronate to the poly(ethylene oxide) being about 1:50 to 100:1.
Claim 3
Dependent Claim
18 words
A composition according to claim 1 wherein the hyaluronate is an alkali metal or alkaline earth metal hyaluronate.
Claim 4
Dependent Claim
12 words
A composition according to claim 2 wherein the hyaluronate is sodium hyaluronate.
Claim 5
Dependent Claim
38 words
A composition according to claim 2 wherein the hyaluronate is a pure hyaluronic acid salt or a mixture of hyaluronates with proteins and other naturally occurring substances derived from the natural material from which the hyaluronate is derived.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |