EP0468797B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Wound dressing material
Assignee: HIROSHI HOJO
•
Filing: 1991-07-25
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Granted: 1995-12-20
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Expires: 2011-07-25
Abstract
No abstract record available.
Inventors
- 👤 Joichi Koga
- 👤 Hiroshi Hojo
- 👤 Koichi Nomura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 18:22
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A wound dressing material made of animal-fibered fabric, produceable by a process wherein keratin layers of the surfaces of the animal fibers are stripped off to expose the non-keratin protein in the underlayers, whereby the surfaces of the animal fibers are modified to be hydrophillic, wherein said process comprises: (i) placing said animal fibers in an aqueous solution comprising water and an electrophilic reagent, (ii) applying a mechanical strain essentially consisting of rapid bending and stretching to said animal fibers, (iii) applying an oxidizing agent to said animal fibers in an amount effective to remove said keratin layers.
Claim 2
Dependent Claim
17 words
A wound dressing material according to claim 1 wherein wool provides the animal fibers of the fabric.
Claim 3
Independent Claim
107 words
A method of producing a wound dressing material made of animal-fibered fabric, wherein keratin layers of the surfaces of the animal fibers are stripped off to expose the non-keratin protein in the underlayers, whereby the surfaces of the animal fibers are modified to be hydrophillic, said method comprising the steps of placing said animal fibers in an aqueous solution comprising water and an electrophilic reagent, and thereafter applying an oxidizing agent to said animal fibers in an amount effective to remove said keratin layers characterised in that prior to applying said oxidizing agent, the fibers are subjected to mechanical strain essentially consisting of rapid bending and stretching.
Claim 4
Dependent Claim
18 words
A method according to claim 3 in which wool is used as the animal fibers of the fabric.
Claim 5
Independent Claim
110 words
A method of treating animal fibers to be used in producing a wound dressing material, wherein keratin layers of the surfaces of the animal fibers are stripped off to expose the non-keratin protein in the underlayers, whereby the surfaces of the animal fibers are modified to be hydrophillic, said method comprising the steps of placing said animal fibers in an aqueous solution comprising water and an electrophilic reagent, and thereafter applying an oxidizing agent to said animal fibers in an amount effective to remove said keratin layers characterised in that prior to applying said oxidizing agent, the fibers are subjected to mechanical strain essentially consisting of rapid bending and stretching.
Claim 6
Dependent Claim
52 words
Use of animal-fibered material in a wound dressing, said material having been treated to render the fiber surfaces hydrophillic by stripping of keratin layers from the surfaces of the fibers to expose the non-keratin protein of the layers while subjecting the fibers to mechanical treatment consisting essentially of rapid bending and stretching.
Claim 7
Dependent Claim
13 words
Use of a woolen material as a wound dressing according to claim 6.
References Cited (Backward Citations)
No citation records indexed.
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