US4591501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cosmetic and pharmaceutical sheet material containing polypeptides
Assignee: Seton Co
•
Filing: 1984-05-16
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Granted: 1986-05-27
•
Expires: 2004-05-16
Abstract
Abstract A flexible continuous film is comprised of a physical admixture of a polypeptide, a plasticizer and a film-forming flexible polymer. When the film is moistened, the polypeptides exude therefrom.
Inventors
- 👤 Gheorghe Cioca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:38
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/0212; A61K8/18; A61K8/30; A61K8/64; A61K8/65; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/32; A61L26/00; A61L26/0009; A61L26/0014; A61L26/0028; A61L26/0047; A61L26/0061; A61L26/0076; A61Q; A61Q19/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
231 words
In the method of cosmetically treating human skin by applying polypeptides topically thereto, the improvement comprising: (a) contacting the skin with a water-moistened sheet material in the form of a cosmetic face mask, consisting essentially of water-moistened polypeptides formed of a flexible continuous film which, moistened, exudes said polypeptide while remaining as a continuous film, comprising a homogeneous physical admixture of: (i) a polypeptide selected from the group consisting of collagen, elastin and polypeptides derived from collagen and elastin and having a molecular weight of at least 2,000 to 20,000, wherein when said polypeptide is derived from collagen and elastin it is present at a level of 25 to 75 percent by weight based on the weight of the admixture and when said polypeptide is collagen or elastin it is present at a level of 3 to 5 percent by weight based on the weight of said admixture; (ii) 20 to 40 percent by weight of glycerol, dipropylene glycol, diethylene glycol, or mixtures thereof, as a water soluble non-volatile plasticizer having a boiling point in excess of about 150° C.; and (iii) 10 to 20 percent by weight of a film-forming polyvinyl alcohol which is soluble in hot water and insoluble in cold water; for a time sufficient to allow said polypeptides to exude from said sheet material onto said skin; and (b) removing said sheet material from said treated skin.
Claim 2
Dependent Claim
231 words
In the method of cosmetically treating human skin by applying polypeptides topically thereto, the improvement comprising: (a) contacting the skin with a water-moistened sheet material in the form of a cosmetic face mask, consisting essentially of water-moistened polypeptides formed of a flexible continuous film which, moistened, exudes said polypeptide while remaining as a continuous film, comprising a homogeneous physical admixture of: (i) a polypeptide selected from the group consisting of collagen, elastin and polypeptides derived from collagen and elastin and having a molecular weight of at least 2,000 to 20,000, wherein when said polypeptide is derived from collagen and elastin it is present at a level of 25 to 75 percent by weight based on the weight of the admixture and when said polypeptide is collagen or elastin it is present at a level of 3 to 5 percent by weight based on the weight of said admixture; (ii) 20 to 40 percent by weight of glycerol, dipropylene glycol, diethylene glycol, or mixtures thereof, as a water soluble non-volatile plasticizer having a boiling point in excess of about 150° C.; and (iii) 10 to 20 percent by weight of a film-forming polyvinyl alcohol which is soluble in hot water and insoluble in cold water; for a time sufficient to allow said polypeptides to exude from said sheet material onto said skin; and (b) removing said sheet material from said treated skin.
Claim 3
Dependent Claim
21 words
The improvement of claim 1 wherein said polypeptides are selected from the group consisting of collagen and polypeptides derived from collagen.
Claim 4
Dependent Claim
20 words
The improvement of claim 1 wherein said polypeptides are present at a level of 40 to 60 percent by weight.
Claim 5
Dependent Claim
21 words
The improvement of claim 1 wherein the polypeptides are selected from the group consisting of elastin and polypeptides derived from elastin.
Claim 6
Dependent Claim
29 words
The improvement of claim 1 wherein the sheet material is in the form of a cosmetic face mask provided with holes and slits and mounted on a release sheet.
Claim 7
Dependent Claim
20 words
The improvement of claim 1 wherein said sheet material is saturated with cold water prior to contact with the skin.
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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) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |