US4883659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skin treatment preparation
Assignee: DENTO-MED INDUSTRIES Inc 941 CLINTMOORE ROAD BOCA RATON FLORIDA 33431 A CORP OF NY
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Filing: 1988-08-24
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Granted: 1989-11-28
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Expires: 2008-08-24
Abstract
Abstract A water resistant, non-gummy hygroscopic, flexible and pliable thin film of 2-hydroxyethyl methacrylate homopolymer deposited on an epidermal surface, a stable emulsion from which the film can be made and a special process for the manufacture of the stable emulsion, utilizing an ammonium salt of a long chain fatty acid as an emulsifying agent therein. The topical application of stable emulsions utilizing an ammonium salt of a long chain fatty acid as an emulsifying agent therein, from which a water resistant, non-gummy, hygoscopic, flexible and pliable thin film of 2-hydroxyethyl methacrylate homopolymer is deposited on an epidermal surface. Special solvent combinations and emulsification techniques are described.
Inventors
- 👤 Jack J. Goodman
- 👤 Harvey S. Tauman
- 👤 Charles Fox
- 👤 Thomas J. Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:42
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8141; A61K8/8152; A61Q17/00; A61Q17/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
A stable oil in water emulsion containing an ammonium salt of a long chain fatty acid as a emulsifying agent, 2-hydroxyethyl methacrylate homopolymer in the aqueous phase and a combination of 2-hydroxyethyl methacrylate homopolymer solvents of different activities, at least one is volatile and at least one is nonvolatile, in said aqueous phase.
Claim 2
Dependent Claim
53 words
A stable oil in water emulsion containing an ammonium salt of a long chain fatty acid as a emulsifying agent, 2-hydroxyethyl methacrylate homopolymer in the aqueous phase and a combination of 2-hydroxyethyl methacrylate homopolymer solvents of different activities, at least one is volatile and at least one is nonvolatile, in said aqueous phase.
Claim 3
Dependent Claim
47 words
A composition of matter comprising a thin film from the topical application of a stable emulsion of the oil and water emulsion of claim 1 from which a water resistant, non-gummy, hygroscopic, flexible and pliable thin film of 2-hydroxyethyl methacrylate homopolymer is deposited on an epidermal surface.
Claim 4
Dependent Claim
9 words
A cosmetic formulation comprising the emulsion of claim 1.
Claim 5
Dependent Claim
48 words
A composition of matter comprising a thin film from the cosmetic topical application of a stable emulsion of the oil and water emulsion of claim 1 from which a water resistant, non-gummy, hygroscopic, flexible and pliable thin film of 2-hydroxyethyl methacrylate homopolymer is deposited on an epidermal surface.
Claim 6
Dependent Claim
59 words
A cosmetic oil in water emulsion comprising the stable oil in water emulsion of claim 1 in which said emulsion contains an oil phase and a water phase which comprises 2-hydroxyethyl methacrylate homopolymer in the water phase, at least three solvents for 2-hydroxyethyl methacrylate homopolymer, and an ammonium salt of a long chain fatty acid as an emulsifying agent.
Claim 7
Dependent Claim
35 words
The emulsion of claim 5 wherein the solvents for 2-hydroxyethyl methacrylate homopolymer comprise a. an active and volatile solvent, b. a lesser intermediately active and nonvolatile solvent and c. a least active and nonvolatile solvent.
Claim 8
Dependent Claim
12 words
The emulsion of claim 6 wherein the ammonium salt is ammonium stearate.
Claim 9
Dependent Claim
44 words
The emulsion of claim 6 wherein the solvents for 2-hydroxyethyl methacrylate homopolymer comprise i. ethanol as an active and volatile solvent, ii. 1,2-propylene glycol as a lesser intermediately active and nonvolatile solvent and iii. a nonionic surfactant as a least active and nonvolatile solvent.
Claim 10
Dependent Claim
16 words
The emulsion of claim 8 wherein the nonionic surfactant is an ethoxylate of a fatty alcohol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |