US4497862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture vapor permeable sheet materials
Assignee: Seton Co
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Filing: 1983-08-08
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Granted: 1985-02-05
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Expires: 2003-08-08
Abstract
Abstract A moisture vapor permeable sheet material is comprised of a homogeneous admixture of a synthetic polymer material and a protein derivative. The sheet material is moisture vapor permeable and non-penetrable by liquid water. The sheet material additionally can have coated thereon a pressure sensitive adhesive which is comprised of a snythetic organic polymer adhesive and a soluble protein derivative in solid solution. Sheet material is formed by providing a homogeneous fluid solution of a soluble protein derivative and a synthetic organic polymer in a solvent. The protein derivative has a pH level compatible with the pH level of the organic polymer. Film is formed from the homogeneous fluid solution and the solvent is removed from the film to form the sheet material which is moisture vapor permeable. When the sheet material includes an adhesive, the adhesive is coated as a fluid solution in a solvent on one side of the sheet material.
Inventors
- 👤 George Cioca
- 👤 George F. Feeley
- 👤 Joseph B. Brabson
- 👤 Peter Barth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:56
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; C; C08; C08L; C08L75/00; C08L75/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31725; Y10T428/31768
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
49 words
A moisture vapor permeable sheet material comprising: a homogeneous mixture of a synthetic polymeric material and a protein, said sheet material being moisture vapor permeable and nonpenetrable by liquid water, and said protein being selected from the group consisting of collagen and elastin and derivatives of collagen and elastin.
Claim 2
Dependent Claim
49 words
A moisture vapor permeable sheet material comprising: a homogeneous mixture of a synthetic polymeric material and a protein, said sheet material being moisture vapor permeable and nonpenetrable by liquid water, and said protein being selected from the group consisting of collagen and elastin and derivatives of collagen and elastin.
Claim 3
Dependent Claim
14 words
The sheet material of claim 1 having a thickness of up to 5 mils.
Claim 4
Dependent Claim
16 words
The sheet material of claim 1 wherein said synthetic polymeric material is a thermoplastic polyurethane polymer.
Claim 5
Dependent Claim
16 words
The sheet material of claim 1 wherein said soluble protein derivative is macromolecular biologically active collagen.
Claim 6
Dependent Claim
9 words
The sheet material of claim 1 which is nonmicroporous.
Claim 7
Dependent Claim
13 words
The sheet material of claim 1 wherein said admixture is a solid solution.
Claim 8
Dependent Claim
23 words
The sheet material of claim 6 wherein said solid solution is formed from a polyurethane polymer and protein derivative in an organic solvent.
Claim 9
Dependent Claim
23 words
The sheet material of claim 6 wherein said solid solution is formed from a polyurethane polymer and protein derivative in an aqueous medium.
Claim 10
Dependent Claim
20 words
The sheet material of claim 8 wherein said polyurethane polymer is in the form of an aqueous polyurethane dispersion. PG,25
Claim 11
Dependent Claim
16 words
The sheet material of claim 1 wherein said soluble protein derivative is oligopeptides derived from collagen.
Claim 12
Dependent Claim
17 words
The sheet material of claim 10 wherein said oligopeptides have a molecular weight between 5,000 and 20,000.
Claim 13
Dependent Claim
14 words
The sheet material of claim 1 wherein said protein derivative is denatured macromolecular collagen.
Claim 14
Dependent Claim
9 words
The sheet material of claim 12 which is microporous.
Claim 15
Dependent Claim
16 words
The sheet material of claim 1 having about 1 to 15 percent by weight protein derivative.
Claim 16
Dependent Claim
16 words
The sheet material of claim 14 having about 3 to 5 percent by weight protein derivative.
Claim 17
Dependent Claim
22 words
The sheet material of claim 1 having a moisture vapor permeability of at least 300 g/m 2 /24 hours at 40° C.
Claim 18
Dependent Claim
22 words
The sheet material of claim 16 having a moisture vapor permeability of at least 500 g/m 2 /24 hours at 40° C.
Claim 19
Dependent Claim
15 words
The sheet material of claim 1 having a tensile strength of at least 1,000 psi.
Claim 20
Dependent Claim
15 words
The sheet material of claim 18 having a tensile strength of at least 2,000 psi.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |