CA1176932A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Wound dressing
Assignee: Department of National Defence
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Filing: 1981-09-14
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Granted: 1984-10-30
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Expires: 2001-09-14
Abstract
Abstract Abstract of the Disclosure The invention disclosed is a wound comprising a blend of a water-soluble resin material such as poly(ethylene oxide) and polyethylen-imine, and gelatin. Suitable blends are those which can be formed into a continuous film and are adherent to a wound.
Inventors
- 👤 Douglas G. Murray
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-25 05:40
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
21 words
A wound dressing, comprising a blend of a water-soluble resin material and gelatin, in the form of a continuous wound-adherent film.
Claim 2
Dependent Claim
21 words
A wound dressing, comprising a blend of a water-soluble resin material and gelatin, in the form of a continuous wound-adherent film.
Claim 3
Dependent Claim
33 words
A wound dressing, comprising a blend of a water-soluble synthetic resin material selected from the group consisting of poly(alkylene oxide) and polyalkylenimine, and gelatin, in the form of a continuous wound adherent film.
Claim 4
Dependent Claim
33 words
A wound dressing, comprising a blend of a water-soluble synthetic resin material selected from the group consisting of poly(alkylene oxide) and polyalkylenimine, and gelatin, in the form of a continuous wound adherent film.
Claim 5
Dependent Claim
24 words
A wound dressing, according to claim l or 2, wherein the water-soluble resin material is selected from the group consisting of poly(ethylene-oxide) and polyethylenimine.
Claim 6
Dependent Claim
16 words
4 A wound dressing according to claim 2, wherein the water-soluble synthetic resin is poly(ethylene oxide).
Claim 7
Dependent Claim
21 words
A wound dressing to according to claim 5, wherein the gelatin has a 0.2-2 parts poly(ethylene oxide) per part of gelatin.
Claim 8
Dependent Claim
27 words
A wound dressing according to claim 5, wherein the gelatin has a Bloom number of 80-290 and the poly(ethylene oxide) has a molecular weight of 14,000 -10,000,000.
Claim 9
Dependent Claim
19 words
A wound dressing according to claim 6, comprising gelatin and poly-ethylene oxide) in a weight ratio of about 7:5.
Claim 10
Dependent Claim
27 words
A wound dressing according to claim 7, wherein the gelatin has a Bloom number of about 250 and the molecular weight of poly(ethylene oxide) is about 17,500.
Claim 11
Dependent Claim
22 words
A wound dressing according to claim 4, 6 or 7, wherein the thickness of the continuous film is 0.06 to 0.30 mm.
Claim 12
Dependent Claim
22 words
A wound dressing according to claim 4, 7 or 8, wherein the thickness of the continuous film is 0.10 to 0.15 mm.
Claim 13
Dependent Claim
14 words
A would dressing according to claim 2, wherein the water-soluble synthetic resin is polyethylenimine.
Claim 14
Dependent Claim
21 words
A wound dressing according to claim 11, wherein the blend comprises gelatin and polyethylenimine in weight ratios of 9:1 to 3:7.
Claim 15
Dependent Claim
18 words
A wound dressing according to claim 12, comprising gelatin and poly-ethylenimine in a weight ratio oi about 1:1.
Claim 16
Dependent Claim
17 words
A wound dressing according to claim 13, wherein the gelatin has a Bloom number of about 150.
Claim 17
Dependent Claim
19 words
A wound dressing according to claim 14, wherein the thickness of the continuous film is 0.05 to 0.35 mm.
Claim 18
Dependent Claim
24 words
A wound dressing according to claim 15, wherein the thickness of the continuous film is 0.15 to 0.20 mm. CLAIMS SUPPORTED BY SUPPLEMENTARY DISCLOSURE
Claim 19
Dependent Claim
24 words
A wound dressing, comprising a blend of a water-soluble resin material, gelatin and a compatible plasticizer, in the form of a continuous wound-adherent film.
Claim 20
Dependent Claim
24 words
A wound dressing, comprising a blend of a water-soluble resin material, gelatin and a compatible plasticizer, in the form of a continuous wound-adherent film.
Claim 21
Dependent Claim
16 words
A wound dressing according to claim 17, wherein the water-soluble synthetic resin material is poly(ethylene oxide).
Claim 22
Dependent Claim
15 words
A wound dressing according to claim 17, wherein the water-soluble synthetic resin material is polyethylenimine.
Claim 23
Dependent Claim
15 words
A wound dressing according to claim 17, 18 or 19, wherein the plasticizer is glycerol.
Claim 24
Dependent Claim
28 words
A wound dressing according to claim 18, wherein the gelatin has a Bloom # of 250 and the poly(ethylene oxide) has a molecular weight of 15,000 to 20,000.
Claim 25
Dependent Claim
17 words
A wound dressing according to claim 21, wherein the thickness of the film is about 0.09 mm.
Claim 26
Dependent Claim
22 words
A wound dressing according to claim 17, 18 or 22, comprising gelatin, poly(ethylene oxide) and glycerol in a weight ratio of 7:5:2.5.
Claim 27
Dependent Claim
22 words
A wound dressing according to claim 19, wherein the gelatin has a Bloom # of 150 and the polyethylenimine is Polymin p?
Claim 28
Dependent Claim
17 words
A wound dressing according to claim 24, wherein the thickness of the film is about 0.13 mm.
Claim 29
Dependent Claim
22 words
26 A wound dressing according to claim 17, 19 or 25, comprising gelatin, polyethylenimine and glycerol in a weight ratio of 5:5:2.
Claim 30
Dependent Claim
72 words
27, A method for making a continuous wound-adherent film, said film comprising gelatin and polyethylenimine, the method comprising a) dissolving gelatin and an aqueous solution of polyethylenimine in distilled water; b) adding to the aqueous solution a suitable acid to lower the pH of the solution to 7-9.5; c) pouring the solution onto a flat surface; and d) allowing the solution to dry in air at room temperature to form the film.
Claim 31
Dependent Claim
72 words
27, A method for making a continuous wound-adherent film, said film comprising gelatin and polyethylenimine, the method comprising a) dissolving gelatin and an aqueous solution of polyethylenimine in distilled water; b) adding to the aqueous solution a suitable acid to lower the pH of the solution to 7-9.5; c) pouring the solution onto a flat surface; and d) allowing the solution to dry in air at room temperature to form the film.
Claim 32
Dependent Claim
20 words
A method according to claim 27, wherein the acid is selected from the group consisting of H2SO4, H3PO4 and HCl.
Claim 33
Dependent Claim
11 words
A method according to claim 28, wherein the acid is HCl.
Claim 34
Dependent Claim
12 words
A method according to claim 29, wherein the pH is about 7.
Claim 35
Dependent Claim
21 words
A method according to claim 30, wherein the gelatin has a Bloom # of 150 and the polyethylenimine is Polymin P?.
Claim 36
Dependent Claim
17 words
A method according to claim 31, wherein the weight ratio of gelatin to Polymin P? is 1:1.
Claim 37
Dependent Claim
25 words
A wound dressing according to claim 19, wherein the gelatin has a Bloom # of about 80 - 350 and the polyethylenimine is Polymin P?.
Claim 38
Dependent Claim
18 words
34 A wound dressing according to claim 33, wherein the gelatin has a Bloom # of about 300.
References Cited (Backward Citations)
No citation records indexed.
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