US4556056A
Expired / Lapsed
US
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Transparent fluid bandage material and the preparation and use thereof
Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV
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Filing: 1983-06-09
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Granted: 1985-12-03
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Expires: 2003-06-09
Abstract
Abstract Novel bandage materials are provided comprising a transparent fluid material consisting of hydrophilic organic transparent gel in sheet or band form, swollen with an aqueous solution which can contain buffer substances, wound treatment agents, nutrients and/or hormones, and optionally, a reinforcing mesh. The fluid bandages are made by dissolving a monomer and a gellable hydrophilic high molecular substance in aqueous medium and starting the gel forming reaction with an initiator for the polymerizable monomer. The bandages can also be utilized as carrier compositions for cell cultures from which metabolites are obtained.
Inventors
- 👤 Herbert Fischer
- 👤 Botho Kickhofen
- 👤 Eckehard Vaubel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:45
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; A61L15/22; A61L15/225; A61L15/28; A61L15/32; A61L26/00; A61L26/0009; A61L26/0023; A61L26/0028; A61L26/0061; A61L26/008
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
69 words
Transparent dressing material which is especially useful for the treatment of wounds, comprising a dry, swellable clear film of hydrophilic, organic transparent gel in the form of a sheet or strip and wherein said gel comprises (a) at least one gellable agar-agar, agarose, gelatine or methyl cellulose and (b) a hydrophilic polymer which has been prepared by polymerization of acrylamide or methacrylamide in an aqueous medium containing component (a).
Claim 2
Dependent Claim
69 words
Transparent dressing material which is especially useful for the treatment of wounds, comprising a dry, swellable clear film of hydrophilic, organic transparent gel in the form of a sheet or strip and wherein said gel comprises (a) at least one gellable agar-agar, agarose, gelatine or methyl cellulose and (b) a hydrophilic polymer which has been prepared by polymerization of acrylamide or methacrylamide in an aqueous medium containing component (a).
Claim 3
Dependent Claim
14 words
Dressing material as claimed in claim 1 additionally containing a nutrient or growth material.
Claim 4
Dependent Claim
10 words
Dressing material of claim 1, wherein component (a) is agar-agar.
Claim 5
Dependent Claim
10 words
Dressing material of claim 1, wherein component (a) is agarose.
Claim 6
Dependent Claim
15 words
Dressing material of claim 1, wherein said hydrophilic polymer is prepared by polymerization of acrylamide.
Claim 7
Dependent Claim
34 words
Dressing material of claim 1, wherein the gel comprises 50 to 90 percent by weight of polymerized acrylamide or methacrylamide and 50 to 10 percent by weight of agar-agar, agarose, gelatin or methyl cellulose.
Claim 8
Dependent Claim
11 words
Dressing material of claim 1, wherein said hydrophilic polymer is cross-linked.
Claim 9
Dependent Claim
18 words
Dressing material of claim 7, wherein said hydrophilic polymer is cross-linked with a bifunctional or polyfunctional polymerizable component.
Claim 10
Dependent Claim
60 words
Transparent fluid bandage material comprising a hydrophilic organic transparent gel sheet swollen with an aqueous solution containing buffer substances, wound treatment agents, nutrients and/or hormones and comprising (a) at least one gellable agar-agar, agarose, gelatine or methyl cellulose and (b) a hydrophilic polymer which has been prepared by polymerization of acrylamide or methacrylamide in an aqueous medium containing component (a).
Claim 11
Dependent Claim
60 words
Transparent fluid bandage material comprising a hydrophilic organic transparent gel sheet swollen with an aqueous solution containing buffer substances, wound treatment agents, nutrients and/or hormones and comprising (a) at least one gellable agar-agar, agarose, gelatine or methyl cellulose and (b) a hydrophilic polymer which has been prepared by polymerization of acrylamide or methacrylamide in an aqueous medium containing component (a).
Claim 12
Dependent Claim
11 words
Fluid bandage material of claim 9, wherein component (a) is agar-agar.
Claim 13
Dependent Claim
11 words
Fluid bandage material of claim 9, wherein component (a) is agarose.
Claim 14
Dependent Claim
16 words
Fluid bandage material of claim 9, wherein said hydrophilic polymer is prepared by polymerization of acrylamide.
Claim 15
Dependent Claim
36 words
Fluid bandage material of claim 9, wherein the gel comprises 50 to 90 percent by weight of polymerized acrylamide or methacrylamide and to 50 to 10 percent by weight of agar-agar, agarose, gelatin or methyl cellulose.
Claim 16
Dependent Claim
12 words
Fluid bandage material of claim 9, wherein said hydrophilic polymer is cross-linked.
Claim 17
Dependent Claim
19 words
Fluid bandage material of claim 14, wherein said hydrophilic polymer is cross-linked with a bifunctional or polyfunctional polymerizable component.
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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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |