Patent US4818521A successfully refreshed from Google Patents.
US4818521A
Expired / Lapsed
US
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Emulsion cosmetic stably containing vitamin C
Assignee: Sunstar Inc
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Filing: 1986-11-24
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Granted: 1989-04-04
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Expires: 2006-11-24
Abstract
Abstract An emulsion cosmetic stably containing vitamin C which comprises a mixture of L-ascorbic acid or a fatty acid ester thereof and an oil, and conventional ingredients for the emulsion cosmetic.
Inventors
- 👤 Hiroshi Tamabuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:05
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/06; A61K8/062; A61K8/18; A61K8/30; A61K8/67; A61K8/676; A61Q; A61Q19/00; A61K2800/00; A61K2800/40; A61K2800/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
An emulsion cosmetic containing stabilized Vitamin C which comprises: (A) an oil in water emulsion emulsified with a non-ionic surface active agent selected from the group consisting of sorbitan fatty acid esters, glycerol fatty acid esters and polyoxyethylene alcohol ethers; and (B) a mixture of L-ascorbic acid or a fatty acid ester thereof and an oil selected from the group consisting of silicone oils, liquid paraffin, squalane, castor oil, olive oil and isopropyl myristate; said cosmetic being prepared by: (1) first admixing said oil with said L-ascorbic acid or a fatty acid ester thereof within a weight ratio of said oil to said L-ascorbic acid or a fatty acid ester thereof, being about 1:0.5 to 4; and (2) mixing said mixture with said oil in water emulsion in an amount of 1 to 10% by weight, based on the total weight of the resultant emulsion cosmetic.
Claim 2
Dependent Claim
146 words
An emulsion cosmetic containing stabilized Vitamin C which comprises: (A) an oil in water emulsion emulsified with a non-ionic surface active agent selected from the group consisting of sorbitan fatty acid esters, glycerol fatty acid esters and polyoxyethylene alcohol ethers; and (B) a mixture of L-ascorbic acid or a fatty acid ester thereof and an oil selected from the group consisting of silicone oils, liquid paraffin, squalane, castor oil, olive oil and isopropyl myristate; said cosmetic being prepared by: (1) first admixing said oil with said L-ascorbic acid or a fatty acid ester thereof within a weight ratio of said oil to said L-ascorbic acid or a fatty acid ester thereof, being about 1:0.5 to 4; and (2) mixing said mixture with said oil in water emulsion in an amount of 1 to 10% by weight, based on the total weight of the resultant emulsion cosmetic.
Claim 3
Dependent Claim
38 words
An emulsion cosmetic according to claim 1, wherein said mixture is thoroughly kneaded after admixing said oil with said L-ascorbic acid or a fatty acid ester thereof and before mixing said mixture with said oil in water emulsion.
Claim 4
Dependent Claim
17 words
An emulsion cosmetic according to the claim 1, wherein the oil in water emulsion is weakly acidic.
Claim 5
Dependent Claim
28 words
An emulsion cosmetic according to claim 1, wherein the fatty acid ester is a mono-, di- or triester of a fatty acid having 10 or more carbon atoms.
Claim 6
Dependent Claim
29 words
An emulsion cosmetic according to claim 4, wherein the fatty acid ester in a member selected from the group consisting of monopalmitate, dipalmitate, monostearate and distearate of L-ascorbic acid.
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |