US5059424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogel wound dressing product
Assignee: Conmed Corp
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Filing: 1989-11-01
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Granted: 1991-10-22
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Expires: 2009-11-01
Abstract
Abstract A wound dressing product is described which includes a flexible backing member that can be vacuum formed to include a depression. A pressure-sensitive adhesive layer extends across the depression side of the flexible backing member. A hydrogel material is positioned in the depression of the flexible backing member and a release liner extends over the exposed pressure-sensitive adhesive layer and the exposed hydrogel material, which release liner has a selective releasability whereby it can be removed from the wound dressing product intact, leaving a portion of the pressure-sensitive adhesive and the hydrogel material exposed.
Inventors
- 👤 James V. Cartmell
- 👤 Wayne R. Sturtevant
- 👤 Manuel Valadez
- 👤 Michael L. Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; A; A61; A61F; A61F13/00; A61F13/02; A61F13/0203; A61F13/023; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/60; A61L26/00; A61L26/0009; A61L26/0019; A61L26/0061; A61L26/008; A61P; A61P17/00; C08G18/08; C08G18/10; A61F2013/00361; A61F2013/00727; A61F2013/00748; A61F2013/00846; A61F2013/00851; A61F2013/00855; A61F2013/00868; A61F2013/00885; A61F13/15; A61F13/15577; A61F2013/15821; A61F2013/15926; C08G2210/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A wound dressing product comprising: a flexible backing member having a first side and a second side and further having a vacuum formed center portion to define a depression on said first side; a pressure-sensitive adhesive layer extending across said first side of said flexible backing member; a hydrogel material located in said depression of said flexible backing member, said hydrogel material comprises from about 15% to about 30% by weight of a polyhydric alcohol, from about 8% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide-based diamine, from about 0% to about 1% by weight of a salt, and the balance water; and a release liner extending over said exposed pressure-sensitive adhesive layer and said exposed hydrogel material.
Claim 2
Dependent Claim
133 words
A wound dressing product comprising: a flexible backing member having a first side and a second side and further having a vacuum formed center portion to define a depression on said first side; a pressure-sensitive adhesive layer extending across said first side of said flexible backing member; a hydrogel material located in said depression of said flexible backing member, said hydrogel material comprises from about 15% to about 30% by weight of a polyhydric alcohol, from about 8% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide-based diamine, from about 0% to about 1% by weight of a salt, and the balance water; and a release liner extending over said exposed pressure-sensitive adhesive layer and said exposed hydrogel material.
Claim 3
Dependent Claim
80 words
A wound dressing product comprising: a flexible backing sheet; a perimeter-defining, damming layer on the flexible backing member having a central cavity; and a hydrogel material comprising from about 15% to about 30% by weight of a polyhydric alcohol, from about 8% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide based diamine, up to about 1% by weight of a salt, and the balance water.
Claim 4
Dependent Claim
80 words
A wound dressing product comprising: a flexible backing sheet; a perimeter-defining, damming layer on the flexible backing member having a central cavity; and a hydrogel material comprising from about 15% to about 30% by weight of a polyhydric alcohol, from about 8% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide based diamine, up to about 1% by weight of a salt, and the balance water.
Claim 5
Dependent Claim
48 words
A wound dressing product as claimed in claim 2 wherein said hydrogel comprises: 17% by weight of said polyhydric alcohol; 12% by weight of said isophorone diisocyanate terminated prepolymer; 9% by weight of said polyethylene oxide based diamine; 1% by weight of said salt; and the balance water.
Claim 6
Dependent Claim
18 words
A wound dressing product as claimed in claim 2 wherein said flexible backing sheet comprises a polyurethane film.
Claim 7
Dependent Claim
15 words
A wound dressing product as claimed in claim 2 wherein said hydrogel material is transparent.
Claim 8
Dependent Claim
24 words
A wound dressing product as claimed in claim 2 further comprising a printed wound sizer on said flexible backing sheet overlying said hydrogel material.
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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) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |