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US4663157A
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Sunscreen compositions
Assignee: Procter and Gamble Co
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Filing: 1985-09-26
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Granted: 1987-05-05
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Expires: 2005-09-26
Abstract
Abstract Sunscreen compositions are disclosed which are resistant to rub-off and the concomitant loss of protection provided by the sunscreen.
Inventors
- 👤 Earl D. Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:16
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/06; A61K8/062; A61K8/18; A61K8/30; A61K8/33; A61K8/34; A61K8/345; A61K8/72; A61K8/81; A61K8/8141; A61K8/8147; A61Q; A61Q17/00; A61Q17/04; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
An oil in water emulsion sunscreen composition comprising: (A) from about 1% to about 20% of an oil soluble sunscreen; (B) from about 0.25% to about 3% of an ethylene acrylic acid copolymer having the formula ##STR3## (C) from about 2% to about 10% of an emulsifier; and (D) from about 70% to about 96% of water; wherein the ratio of A:B is from about 12:1 to about 15:1 and the ratio of x:y is from about 1:9 to about 1:24 and the molecular weight of B is from about 3500 to about 4500.
Claim 2
Dependent Claim
94 words
An oil in water emulsion sunscreen composition comprising: (A) from about 1% to about 20% of an oil soluble sunscreen; (B) from about 0.25% to about 3% of an ethylene acrylic acid copolymer having the formula ##STR3## (C) from about 2% to about 10% of an emulsifier; and (D) from about 70% to about 96% of water; wherein the ratio of A:B is from about 12:1 to about 15:1 and the ratio of x:y is from about 1:9 to about 1:24 and the molecular weight of B is from about 3500 to about 4500.
Claim 3
Dependent Claim
11 words
A composition according to claim 1 which also contains a humectant.
Claim 4
Dependent Claim
12 words
A composition according to claim 1 which also contains a thickening agent.
Claim 5
Dependent Claim
28 words
A composition according to claim 1 wherein the sunscreen is selected from the group consisting of 2-ethylhexyl p-methoxycinnamate, butyl methoxydibenzoylmethane, 2-hydroxy-4-methoxy-benzophenone, octyl dimethyl p-aminobenzoic acid and mixtures thereof.
Claim 6
Dependent Claim
17 words
A composition according to claim 1 wherein the emulsifier is a mixture of anionic and nonionic emulsifiers.
Claim 7
Dependent Claim
11 words
A composition according to claim 3 wherein the humectant is glycerine.
Claim 8
Dependent Claim
11 words
A composition according to claim 6 which also contains a thickener.
Claim 9
Dependent Claim
13 words
A composition according to claim 7 wherein the thickener is a carboxyvinyl polymer.
Claim 10
Dependent Claim
11 words
A composition according to claim 8 which in addition contains petrolatum.
Claim 11
Dependent Claim
24 words
A composition according to claim 1 wherein the oil phase particles have a mean particle size of from about 5 to about 10 microns.
Claim 12
Dependent Claim
54 words
A method of protecting skin from UV rays comprising the following steps to be performed prior to UV exposure: (A) applying from about 0.5 mg/cm 2 to about 5 mg/cm 2 of a composition according to claim 1 to the skin area desired to be protected; and (B) rubbing the composition into the skin.
Claim 13
Dependent Claim
14 words
A method according to claim 11 wherein the composition is according to claim 5.
Claim 14
Dependent Claim
15 words
A method according to claim 11 wherein the composition is in accordance with claim 8.
Claim 15
Dependent Claim
15 words
A method according to claim 11 wherein the composition is in accordance with claim 9.
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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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |