US4585797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cosmetic and pharmaceutical sheet material containing polypeptides
Assignee: Seton Co
•
Filing: 1984-05-16
•
Granted: 1986-04-29
•
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 17:37
CPC Classifications
A; A61; A61Q; A61Q19/00; 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
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
155 words
A flexible continuous film comprising a homogeneous physical admixture of: 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; 20 to 40 percent by weight of a water soluble non-volatile plasticizer having a boiling point in excess of about 150° C.; and 10 to 20 percent by weight of a film-forming polyvinyl alcohol which is soluble in hot water and insoluble in cold water; said film, when moistened, will exude said polypeptide while remaining as a continuous film.
Claim 2
Dependent Claim
155 words
A flexible continuous film comprising a homogeneous physical admixture of: 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; 20 to 40 percent by weight of a water soluble non-volatile plasticizer having a boiling point in excess of about 150° C.; and 10 to 20 percent by weight of a film-forming polyvinyl alcohol which is soluble in hot water and insoluble in cold water; said film, when moistened, will exude said polypeptide while remaining as a continuous film.
Claim 3
Dependent Claim
23 words
The flexible continuous film of claim 1 wherein said polypeptide is selected from the group consisting of collagen and polypeptides derived from collagen.
Claim 4
Dependent Claim
31 words
The flexible continuous film of claim 1 wherein when said film-forming polypeptide is derived from collagen and elastin it is present at a level of 40 to 60 percent by weight.
Claim 5
Dependent Claim
22 words
The flexible continuous film of claim 1 wherein said plasticizer is present at a level of 30 to 40 percent by weight.
Claim 6
Dependent Claim
12 words
The flexible continuous film of claim 1 wherein said plasticizer is glycerol.
Claim 7
Dependent Claim
11 words
The flexible continuous film of claim 1 mounted on a backing.
Claim 8
Dependent Claim
12 words
The flexible continuous film of claim 6 wherein said backing is fabric.
Claim 9
Dependent Claim
12 words
The flexible continuous film of claim 7 wherein said backing is nonwoven.
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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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |