Patent US3957971A successfully refreshed from Google Patents.
US3957971A
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Moisturizing units and moisturizing compositions containing the same
Assignee: CPPD Inc A CORP OF
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Filing: 1974-07-29
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Granted: 1976-05-18
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Expires: 1994-07-29
Abstract
Abstract Moisturizing units capable of moisturizing and improving flexibility, plasticity, and softness of keratinous matter, particularly mammalian skin, comprise liposomes, each having a matrix of a ternary lipid mixture of lecithin, dicetyl phosphate, and a sterol, and having cavities disposed within the liposome, the cavities containing a humectant such as sodium pyroglutamate, in an aqueous medium. The moisturizing liposomes function osmotically, serving as traps for water, which may be shared with the keratin constituents as required.
Inventors
- 👤 Walter S. Oleniacz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:09
CPC Classifications
A; A61; A61Q; A61Q19/00; A61Q19/007; A61K; A61K8/00; A61K8/02; A61K8/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
103 words
A liposome comprising i. a matrix of a ternary lipid mixture comprising about 50 to about 80 molar proportions of lecithin; about 10 to about 30 molar proportions of dicetyl phosphate; and about 10 to about 30 molar proportions of a sterol or caprolactum, said sterol being selected from the group consisting of cholesterol, phytosterol, sitosterol, sitosterol pyroglutamate, 7-dehydrocholesterol, lanosterol and mixtures thereof; and ii. an aqueous solution of a humectant disposed interiorly of said liposome, said humectant being selected from the group consisting of glycerol, urea, sodium pyroglutamate, ornithine, and the Spier-Pascher water solubles; said liposome having a substantially continuous outer surface.
Claim 2
Dependent Claim
103 words
A liposome comprising i. a matrix of a ternary lipid mixture comprising about 50 to about 80 molar proportions of lecithin; about 10 to about 30 molar proportions of dicetyl phosphate; and about 10 to about 30 molar proportions of a sterol or caprolactum, said sterol being selected from the group consisting of cholesterol, phytosterol, sitosterol, sitosterol pyroglutamate, 7-dehydrocholesterol, lanosterol and mixtures thereof; and ii. an aqueous solution of a humectant disposed interiorly of said liposome, said humectant being selected from the group consisting of glycerol, urea, sodium pyroglutamate, ornithine, and the Spier-Pascher water solubles; said liposome having a substantially continuous outer surface.
Claim 3
Dependent Claim
26 words
A method for moisturizing keratinous matter of a living mammal comprising applying to said keratinous matter an effective amount of the liposome claimed in claim 1.
Claim 4
Dependent Claim
12 words
The liposome in accordance with claim 1 wherein said sterol is cholesterol.
Claim 5
Dependent Claim
12 words
The liposome in accordance with claim 1 wherein said sterol is phytosterol.
Claim 6
Dependent Claim
12 words
The liposome in accordance with claim 1 wherein said sterol is sitosterol.
Claim 7
Dependent Claim
13 words
The liposome in accordance with claim 1 wherein said sterol is sitosterol pyroglutamate.
Claim 8
Dependent Claim
12 words
The liposome in accordance with claim 1 wherein said sterol is 7-dehydrocholesterol.
Claim 9
Dependent Claim
12 words
The liposome in accordance with claim 1 wherein said sterol is lanosterol.
Claim 10
Dependent Claim
12 words
The liposome in accordance with claim 1 wherein said humectant is glycerol.
Claim 11
Dependent Claim
12 words
The liposome in accordance with claim 1 wherein said humectant is urea.
Claim 12
Dependent Claim
13 words
The liposome in accordance with claim 1 wherein said humectant is sodium pyroglutamate.
Claim 13
Dependent Claim
12 words
The liposome in accordance with claim 1 wherein said humectant is ornithine.
Claim 14
Dependent Claim
14 words
The liposome in accordance with claim 1 wherein said humectant is the Spier-Pascher water-solubles.
Claim 15
Dependent Claim
27 words
A composition capable of moisturizing keratinous matter of a living mammal, comprising an effective amount of the liposome described in claim 1 in a physiologically acceptable vehicle.
Claim 16
Dependent Claim
14 words
The composition in accordance with claim 14 wherein said vehicle is a skin cream.
Claim 17
Dependent Claim
13 words
The composition in accordance with claim 14 wherein said vehicle is a shampoo.
Claim 18
Dependent Claim
13 words
The composition in accordance with claim 14 wherein said vehicle is a brilliantine.
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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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |