US4384974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable water-in-oil emulsions
Assignee: Revlon Consumer Products LLC
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Filing: 1979-07-27
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Granted: 1983-05-24
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Expires: 1999-07-27
Abstract
Abstract Stable water-in-oil emulsions having water concentrations as high as 85% are obtained with the use of block polymer surfactants such as poloxamers and poloxamines and cosmetically acceptable surfactants having a hydrophylic-lipophilic balance of less than 10.
Inventors
- 👤 Bernadette Guthauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:37
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K47/00; A61K47/06; A61K47/08; A61K47/10; A61K47/16; A61K47/18; A61K8/00; A61K8/02; A61K8/04; A61K8/06; A61K8/064; A61K8/18; A61K8/72; A61K8/90; A61K9/00; A61K9/0012; A61K9/0014; C; C09; C09K; C09K23/00; C09K23/017; A61Q1/00; A61Q1/02; A61Q1/14; A61Q17/00; A61Q17/04; A61Q19/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A stable water-in-oil emulsion comprising in weight percent water: about 70-80 oil: about 10-20 a block polymer surfactant: about 2-15, and a cosmetically acceptable surfactant: about 0.5-15 wherein the block polymer surfactant is selected from the group consisting of polymers of the formula ##STR3## wherein a and c are in the range of 2 to 5 and b is between 35-65, and ##STR4## wherein y1 to y4 are in the range of 3 to 5 and x1 to x4 are in the range of 25 to 32, and the cosmetically acceptable surfactant has a hydrophilic-lipophilic balance of less than 10.
Claim 2
Dependent Claim
100 words
A stable water-in-oil emulsion comprising in weight percent water: about 70-80 oil: about 10-20 a block polymer surfactant: about 2-15, and a cosmetically acceptable surfactant: about 0.5-15 wherein the block polymer surfactant is selected from the group consisting of polymers of the formula ##STR3## wherein a and c are in the range of 2 to 5 and b is between 35-65, and ##STR4## wherein y1 to y4 are in the range of 3 to 5 and x1 to x4 are in the range of 25 to 32, and the cosmetically acceptable surfactant has a hydrophilic-lipophilic balance of less than 10.
Claim 3
Dependent Claim
16 words
A stable water-in-oil emulsion according to claim 1 wherein the block polymer surfactant is a poloxamer.
Claim 4
Dependent Claim
14 words
A stable water-in-oil emulsion according to claim 2 wherein the oil is isopropyl myristate.
Claim 5
Dependent Claim
16 words
A stable water-in-oil emulsion according to claim 1 wherein the block polymer surfactant is a poloxamine.
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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |