Patent US5423737A successfully refreshed from Google Patents.
US5423737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent hydrogel wound dressing with release tab
Assignee: NDM Corp
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Filing: 1993-05-27
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Granted: 1995-06-13
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Expires: 2013-05-27
Abstract
Abstract A flexible, transparent wound dressing product contains a clear hydrogel material in a gel-like phase. The wound dressing product is comprised of several layers including a wound dressing, removable tab and release liner. The removable tab provides a grippable surface to allow for the removal of the release liner from the wound dressing and to facilitate handling of the wound dressing during application to the wound site. The tab may be comprised of a flat, double-coated paper or other suitable material, or a flexible, V-shaped member, and is removable by peeling after the wound dressing is applied. The wound dressing comprises a transparent thin-film layer, a first adhesive layer, backing layer, second adhesive layer, support layer and a hydrogel material. The transparent layer has a center portion and a perimeter portion. The backing layer, support layer and hydrogel material, which together form a reinforced hydrogel patch, are positioned in the center portion of the transparent layer. Since the wound dressing is transparent, a grid pattern may be printed on the backing layer to permit measurement of a wound. During manufacture, the hydrogel patch is assembled in sheet form and subsequently cut to a desired size and shape.
Inventors
- 👤 James V. Cartmell
- 👤 Wayne R. Sturtevant
- 👤 William E. Bausmith, III
- 👤 Michael L. Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:33
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/02; A61F13/023; A61F2013/00089; A61F2013/00217; A61F2013/00361; A61F2013/00544; A61F2013/00604; A61F2013/00608; A61F2013/00727; A61F2013/00748; A61F2013/00795; A61F2013/008; A61F2013/00817; A61F2013/00846; A61F2013/00851; A61F2013/00855; A61F2013/00859; A61F2013/00868; A61F13/15; A61F2013/15008; A61F2013/15024; Y; Y10; Y10S; Y10S602/00; Y10S602/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
320 words
A wound dressing product, comprising: a wound dressing including a transparent layer, having a center portion and a perimeter portion surrounding said center portion, and further having a first side and a second side, a first adhesive layer positioned around said perimeter portion of said second side of said transparent layer, a backing layer having a first side and a second side, said first side adhered to said center portion on said second side of said transparent layer by means of said first adhesive layer, a second adhesive layer positioned on said second side of said backing layer, a support layer having a first side and a second side and comprising a permeable fabric having a plurality of interstices therewithin, said first side adhered to said second side of said backing layer by means of said second adhesive layer, and a hydrogel material contained within said center portion of said transparent layer and secured to said second side of said support layer, wherein said hydrogel material penetrates said interstices to said first side of said support layer such that said hydrogel material resides on both said first side and said second side of said support layer, and whereby said backing layer, said support layer and said hydrogel material collectively form a reinforced hydrogel patch; a release liner overlying said hydrogel patch and secured to said perimeter portion of said second side of said transparent layer by means of said first adhesive layer; and at least one removable tab, interposed between said transparent layer and said release liner, and adhered to at least one edge of said perimeter portion of said second side of said transparent layer by means of said first adhesive layer so as to provide a grippable surface to allow for the removal of said release liner from said transparent layer and to facilitate the handling of said wound dressing during application of said dressing to the wound.
Claim 2
Dependent Claim
320 words
A wound dressing product, comprising: a wound dressing including a transparent layer, having a center portion and a perimeter portion surrounding said center portion, and further having a first side and a second side, a first adhesive layer positioned around said perimeter portion of said second side of said transparent layer, a backing layer having a first side and a second side, said first side adhered to said center portion on said second side of said transparent layer by means of said first adhesive layer, a second adhesive layer positioned on said second side of said backing layer, a support layer having a first side and a second side and comprising a permeable fabric having a plurality of interstices therewithin, said first side adhered to said second side of said backing layer by means of said second adhesive layer, and a hydrogel material contained within said center portion of said transparent layer and secured to said second side of said support layer, wherein said hydrogel material penetrates said interstices to said first side of said support layer such that said hydrogel material resides on both said first side and said second side of said support layer, and whereby said backing layer, said support layer and said hydrogel material collectively form a reinforced hydrogel patch; a release liner overlying said hydrogel patch and secured to said perimeter portion of said second side of said transparent layer by means of said first adhesive layer; and at least one removable tab, interposed between said transparent layer and said release liner, and adhered to at least one edge of said perimeter portion of said second side of said transparent layer by means of said first adhesive layer so as to provide a grippable surface to allow for the removal of said release liner from said transparent layer and to facilitate the handling of said wound dressing during application of said dressing to the wound.
Claim 3
Dependent Claim
15 words
A wound dressing product as claimed in claim 1, wherein said backing layer is transparent.
Claim 4
Dependent Claim
19 words
A wound dressing product as claimed in claim 2, wherein a grid pattern is printed on said backing layer.
Claim 5
Dependent Claim
15 words
A wound dressing product as claimed in claim 1, wherein said tab comprises double-coated paper.
Claim 6
Dependent Claim
16 words
A wound dressing product as claimed in claim 1, wherein said tab comprises a V-shaped member.
Claim 7
Dependent Claim
76 words
A wound dressing product as claimed in claim 5, wherein said V-shaped member comprises a first flap and a second flap, said first flap secured to said second side of said transparent layer by means of said first adhesive layer, said second flap positioned between said first flap and said release liner, and the open end of said V-shaped member positioned along said edge of said transparent layer and the opposing edge of said release liner.
Claim 8
Dependent Claim
20 words
A wound dressing product as claimed in claim 1, wherein said tab is removable from said transparent layer by peeling.
Claim 9
Dependent Claim
17 words
A wound dressing product as claimed in claim 1, wherein said transparent layer comprises a thin-film polyurethane.
Claim 10
Dependent Claim
15 words
A wound dressing product as claimed in claim 1, wherein said release liner is silicone-coated.
Claim 11
Dependent Claim
21 words
A wound dressing product as claimed in claim 1, wherein said first and second adhesive layers comprise a medical-grade acrylic adhesive.
Claim 12
Dependent Claim
17 words
A wound dressing product as claimed in claim 1, wherein said support layer comprises a gauze 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) | 1998-06-12 | 1998-12-12 | 1999-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-12 | 2002-12-12 | 2003-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-12 | 2006-12-12 | 2007-06-13 | $7700.00 | Window Closed / Lapsed |