Patent US4984570A successfully refreshed from Google Patents.
US4984570A
Expired / Lapsed
US
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Knitted hydrophobic web wound dressing
Assignee: KOB GmbH
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Filing: 1989-09-14
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Granted: 1991-01-15
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Expires: 2009-09-14
Abstract
Abstract The textile fabric is used as a wound dressing in much the same way as dressing gauze with improved characteristics compared with the latter and comprises a central web portion of man-made fibers having a high surface tension, and on either side thereof web portions formed from absorbent, cellulosic yarns. The central web portion is connected by looping to the outer web portions so that after folding, a nonstick wound dressing is obtained in which the hydrophobic man-made fibers functioning as the wound covering, come to rest on the wound, while the folded layers of cellulosic fibers behind it, act as an absorbent layer.
Inventors
- 👤 Gunter Langen
- 👤 Harald Jung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:04
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/00051; A61F13/00063; A61F13/01; A61F13/01008; D; D04; D04B; D04B21/00; D04B21/14; A61F2013/00089; A61F2013/00238; A61F2013/00361; A61F2013/00902; A61F2013/0091; A61F2013/00936; D10; D10B; D10B2403/00; D10B2403/03; D10B2403/031; D10B2403/0311; D10B2509/00; D10B2509/02; D10B2509/022
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
156 words
A comprising a broad-width knitted or raschel-knitted web (100) of absorbent, hydrophilic cellulosic spun yarns (111, 112), a strip-like web section (120) of hydrophobic man-made fibers of synthetic polymers having a high surface tension interconnected to the knitted by looping within a plane, wherein the strip-like web section (120) is formed as central strip in the web (100) of knitted fabric (10), the knitted web and the strip-like web section being folded so as to form a wound pad (200) such that the web section (120) of the hydrophobic man-made fibers, as hydrophobic covering layer (210), forms the wound pad and layers of cellulosic spun yarns are located behind the web section to form absorbent layers (220, 221, 222, 223), wherein the diameters of the absorbent, hydrophilic cellulosic yarns and the hydrophobic man-made fibers range between 10 tex and 40 tex, wherein monofilaments, multifilament yarns and staple fiber yarns are used as the hydrophobic man-made yarns.
Claim 2
Dependent Claim
156 words
A comprising a broad-width knitted or raschel-knitted web (100) of absorbent, hydrophilic cellulosic spun yarns (111, 112), a strip-like web section (120) of hydrophobic man-made fibers of synthetic polymers having a high surface tension interconnected to the knitted by looping within a plane, wherein the strip-like web section (120) is formed as central strip in the web (100) of knitted fabric (10), the knitted web and the strip-like web section being folded so as to form a wound pad (200) such that the web section (120) of the hydrophobic man-made fibers, as hydrophobic covering layer (210), forms the wound pad and layers of cellulosic spun yarns are located behind the web section to form absorbent layers (220, 221, 222, 223), wherein the diameters of the absorbent, hydrophilic cellulosic yarns and the hydrophobic man-made fibers range between 10 tex and 40 tex, wherein monofilaments, multifilament yarns and staple fiber yarns are used as the hydrophobic man-made yarns.
Claim 3
Dependent Claim
28 words
A wound dressing according to claim 1, wherein for marking the wound facing side, the man-made fibers of synthetic polymers are dyed with an indifferent, physiologically unobjectionable dye.
Claim 4
Dependent Claim
18 words
A wound dressing according to claim 1, wherein the wound dressing is impregnated with antibacterial or medicinal agents.
Claim 5
Dependent Claim
21 words
A wound dressing according to claim 1, wherein the man-made fibers of synthetic polymers are surface coated with silver or aluminum.
Claim 6
Dependent Claim
19 words
A wound dressing according to claim 1, wherein the cellulosic fiber yarns are cotton, viscose staple or cotton/viscose staple.
Claim 7
Dependent Claim
19 words
A wound dressing according to claim 1, wherein the man-made fibers are polyamide, polyester, polyethylene, polypropylene, polyacrylonitrile or polytetrafluoroethylene.
Claim 8
Dependent Claim
28 words
A wound dressing according to claim 1, wherein the diameters of the absorbent, hydrophilic cellulosic spun yarns and the man-made fibers used are between 14 and 20 tex.
Claim 9
Dependent Claim
20 words
A wound dressing according to claim 2, wherein the dye is selected from pigment dyes, disperse dyes or acid dyes.
Claim 10
Dependent Claim
22 words
A wound dressing according to claim 3, wherein the impregnating agent dressing quaternary ammonium compounds of N-cetyl pyridinium chloride or benzalkonium chloride.
Claim 11
Dependent Claim
14 words
A wound dressing according to claim 3, wherein the impregnating agent has disinfecting characteristics.
Claim 12
Dependent Claim
21 words
A wound dressing according to claim 3, wherein the impregnating agent is petrolatum mixed with Peru balsam, sulphonamides, antibiotics or anaesthetics.
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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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |