US4921704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wound dressing
Assignee: Essity Hygiene and Health AB
•
Filing: 1989-02-21
•
Granted: 1990-05-01
•
Expires: 2009-02-21
Abstract
Abstract A wound dressing for use with exuding wounds is provided comprising a porous hydrophobic layer adapted to directly contact the wound during use and an adjacent absorbent layer attached to said hydrophobic layer, said hydrophobic layer comprised of an elastic net-like porous reinforcing component substantially completely encapsulated by a soft and elastic hydrophobic gel while retaining the porosity of said reinforcing component, said hydrophobic layer thus including openings which permit wound exudate to pass through said hydrophobic layer to be absorbed by said outer absorbent layer.
Inventors
- 👤 Tomas Fabo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
A; A61; A61L; A61L26/00; A61L26/0061; A61L26/008; A61F; A61F13/00; A61F13/01; A61F13/01021; A61F13/15; A61F13/51; A61F13/511; A61F13/51121; A61F13/512; A61F13/513; A61F13/51305; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61F13/84; A61F13/8405; A61F2013/00089; A61F2013/00119; A61F2013/00217; A61F2013/00238; A61F2013/00246; A61F2013/00255; A61F2013/00361; A61F2013/00855; A61F2013/00863; A61F13/53; A61F2013/530007
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A wound dressing for use with exuding wounds comprising a porous hydrophoboc layer adapted to directly contact the wound during use and an adjacent absorbent layer attached to said hydrophobic layer, said hydrophobic layer comprised of an elastic net-like porous reinforcing component of fibers substantially completely encapsulated by a soft and elastic hydrophobic silicone gel with only a strictly limited number of fiber ends being allowed to penetrate the silicone gel and project out of the dressing surface, while preserving the porosity of said reinforcing component, said hydrophobic layer thus including openings which permit wound exudate to pass through said hydrophobic layer to be absorbed by said outer absorbent layer.
Claim 2
Dependent Claim
110 words
A wound dressing for use with exuding wounds comprising a porous hydrophoboc layer adapted to directly contact the wound during use and an adjacent absorbent layer attached to said hydrophobic layer, said hydrophobic layer comprised of an elastic net-like porous reinforcing component of fibers substantially completely encapsulated by a soft and elastic hydrophobic silicone gel with only a strictly limited number of fiber ends being allowed to penetrate the silicone gel and project out of the dressing surface, while preserving the porosity of said reinforcing component, said hydrophobic layer thus including openings which permit wound exudate to pass through said hydrophobic layer to be absorbed by said outer absorbent layer.
Claim 3
Dependent Claim
17 words
The wound dressing of claim 1 wherein said reinforcing component comprises a flexible and elastically-extendable textile material.
Claim 4
Dependent Claim
14 words
The wound dressing of claim 2 wherein said textile material is a knitted textile.
Claim 5
Dependent Claim
14 words
The wound dressing of claim 2 wherein said textile material is a crocheted textile.
Claim 6
Dependent Claim
17 words
The wound dressing of claim 2 wherein said textile material has a knitted, crocheted or woven performance.
Claim 7
Dependent Claim
18 words
The wound dressing of claim 1 wherein said reinforcing component comprises a netting having 5-30 holes/cm 2 .
Claim 8
Dependent Claim
21 words
The wound dressing of claim 6 wherein said holes have a size in the range of from 0.25-4 mm 2 .
References Cited (Backward Citations)
US3006338A
Cited
US2764976A
Cited
US3113568A
Cited
US3767784A
Cited
US4034751A
Cited
US4051848A
Cited
US4311760A
Cited
US4233969A
Cited
US4243656A
Cited
US4404296A
Cited
US4456642A
Cited
US4572814A
Cited
US4624900A
Cited
US4611099A
Cited
US4727868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |