US4655210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam bandage
Assignee: NORSET LP
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Filing: 1986-01-17
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Granted: 1987-04-07
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Expires: 2006-01-17
Abstract
Abstract A disposable bandage, and a process for manufacturing it, which is prepared from a single sheet or strip of liquid permeable, flexible thermoplastic hydrophilic foam. The process includes coating the entire surface of one side of a foam sheet or strip with a layer of porous pressure sensitive adhesive, positioning wound release material in the area of the sheet or strip intended for wound contact, covering the same side of the laminate with a suitable release liner and heat compressing the laminate except at the locus of the wound release material. The foam bandage so produced includes both a resilient absorbent pad and thin but absorbent adhesive-coated tabs. Optionally, the bandage may have a moisture vapor permeable, moisture impermeable skin thereon, to provide a water- and bacteria-proof protective outer layer for the foam bandage.
Inventors
- 👤 Martin I. Edenbaum
- 👤 Borys Rybalka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:58
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/425; A61F; A61F13/00; A61F13/02; A61F13/0203; A61F13/023; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/0074; A61F2013/00761; A61F2013/00765; A61F2013/00855; A61F2013/00868; Y; Y10; Y10S; Y10S602/00; Y10S602/90
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
50 words
A foam bandage, comprising a laminate having a liquid permeable foam layer and a liquid permeable porous pressure sensitive adhesive layer, and having a wound release material adjacent said adhesive for separating said adhesive from a tissue healing area, and securement means associated with said laminate to attach the laminate.
Claim 2
Dependent Claim
50 words
A foam bandage, comprising a laminate having a liquid permeable foam layer and a liquid permeable porous pressure sensitive adhesive layer, and having a wound release material adjacent said adhesive for separating said adhesive from a tissue healing area, and securement means associated with said laminate to attach the laminate.
Claim 3
Dependent Claim
20 words
The foam bandage according to claim 1, wherein said area of said laminate intended for wound contact defines a pad.
Claim 4
Dependent Claim
34 words
The foam bandage according to claim 2, wherein said foam layer and said adjacent porous pressure sensitive adhesive layer exclusive of said pad are heat compressed laminates having a thickness less than said pad.
Claim 5
Dependent Claim
21 words
The foam bandage according to claim 3, wherein said porous pressure sensitive adhesive layer is permeable to liquid water and serum.
Claim 6
Dependent Claim
16 words
The foam bandage according to claim 3, wherein said foam layer is a thermoplastic polyurethane foam.
Claim 7
Dependent Claim
14 words
The foam bandage according to claim 5, wherein said thermoplastic polyurethane foam is hydrophilic.
Claim 8
Dependent Claim
26 words
The foam bandage according to claim 6, wherein said hydrophilic thermoplastic polyurethane foam has a moisture vapor permeable, moisture impermeable skin thereon opposite said adhesive layer.
Claim 9
Dependent Claim
19 words
The foam bandage according to claim 7, wherein said moisture vapor permeable, moisture impermeable skin is a urethane skin.
Claim 10
Dependent Claim
19 words
The foam bandage according to claim 4, wherein said wound release material is permeable to liquid water and serum.
Claim 11
Dependent Claim
23 words
The foam bandage according to claim 9, wherein said porous pressure sensitive adhesive layer is at least partially covered with a release liner.
Claim 12
Dependent Claim
25 words
The foam bandage according to claim 10, wherein an absorbent layer is positioned between said porous pressure sensitive adhesive layer and said wound release material.
Claim 13
Dependent Claim
27 words
The foam bandage according to claim 11, wherein said porous pressure sensitive adhesive layer and said wound release material are each entirely covered with a release liner.
Claim 14
Independent Claim
86 words
A method for preparing a foam bandage, comprising: (a) selecting a low density liquid permeable foam sheet; (b) adhering a porous pressure sensitive adhesive layer, which is permeable to liquid water and serum, to said low density foam sheet to form a laminate; (c) positioning a wound release material in the area of said laminate intended for wound contact to separate the adhesive from a tissue healing area; and (d) heat compressing the entire sheet thus produced except in the area of said wound release material.
Claim 15
Independent Claim
86 words
A method for preparing a foam bandage, comprising: (a) selecting a low density liquid permeable foam sheet; (b) adhering a porous pressure sensitive adhesive layer, which is permeable to liquid water and serum, to said low density foam sheet to form a laminate; (c) positioning a wound release material in the area of said laminate intended for wound contact to separate the adhesive from a tissue healing area; and (d) heat compressing the entire sheet thus produced except in the area of said wound release material.
Claim 16
Dependent Claim
30 words
The method according to claim 13, wherein step (a) further comprises the step of: (a) selecting a low density foam sheet having a moisture vapor permeable, moisture impermeable skin thereon.
Claim 17
Dependent Claim
34 words
The method according to claim 13, wherein step (a) further comprises the step of: (a) selecting a low density hydrophilic thermoplastic polyurethane foam sheet having a moisture vapor permeable, moisture impermeable urethane skin thereon.
Claim 18
Dependent Claim
56 words
The method according to claim 13, wherein step (c) further comprises the step of: (c) partially covering the area of said laminate intended for wound contact with an absorbent material, positioning a wound release material over the entire area of said laminate intended for wound contact, and positioning a release layer adjacent said wound release material.
Claim 19
Dependent Claim
14 words
The foam bandage according to claim 1, wherein said securement means comprises said adhesive.
Claim 20
Dependent Claim
15 words
The foam bandage according to claim 1, wherein said foam is at least partially open-celled.
Claim 21
Dependent Claim
13 words
The method according to claim 13, said foam being at least partially open-celled.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |