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US4306551A Expired / Lapsed US ⏱️ 0.0 years remaining

Sterile improved bandage and sealant

Assignee: Axogen Inc
•
Filing: 1980-07-28
•
Granted: 1981-12-22
•
Expires: 2000-07-28
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Abstract

Abstract A flexible, liquid absorbent, adhesive bandage includes a backing element and a substrate attached to the backing element. The substrate comprises a homogeneous, hydrophilic, stable matrix including a solid phase formed of a synthetic polymer, a long chain polysaccharide, or a combination thereof. The liquid phase of the matrix consists of a hydric alcohol, carbohydrates or proteins.

Inventors

  • 👤 Alan C. Hymes
  • 👤 Lincoln T. Ong
  • 👤 Garry R. Persons

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 02:35
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/58; A61L15/585; A61L15/22; A61L15/28; Y; Y10; Y10T; Y10T428/00; Y10T428/28

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 159 words
A flexible, liquid-absorbent, adhesive bandage to be applied to a patient comprising: a flexible backing element selected from the group comprised of cotton, paper, synthetic fabric or plastic, a substrate attached to said backing element comprising a homogeneous, hydrophilic, stable matrix having adhesive properties for adhesion to the skin and being sufficiently pliant to conform to the shape of the body contours, said matrix including a solid phase comprising about 30% to 50% of the total weight of the matrix and including a synthetic resin selected from the group comprising polyacrylic acid, polyacrylamide and their cogeners, and a liquid phase consisting of a solution or emulsion of carbohydrate and/or protein and comprising from about 40% to 70% by weight of the matrix, said matrix having been sterilized by irradiation, whereby the matrix is capable of effectively absorbing liquid exudate from a wound to which it is applied and being capable of remaining dimensionally stable and tacky during such absorption.
Claim 2
Dependent Claim 159 words
A flexible, liquid-absorbent, adhesive bandage to be applied to a patient comprising: a flexible backing element selected from the group comprised of cotton, paper, synthetic fabric or plastic, a substrate attached to said backing element comprising a homogeneous, hydrophilic, stable matrix having adhesive properties for adhesion to the skin and being sufficiently pliant to conform to the shape of the body contours, said matrix including a solid phase comprising about 30% to 50% of the total weight of the matrix and including a synthetic resin selected from the group comprising polyacrylic acid, polyacrylamide and their cogeners, and a liquid phase consisting of a solution or emulsion of carbohydrate and/or protein and comprising from about 40% to 70% by weight of the matrix, said matrix having been sterilized by irradiation, whereby the matrix is capable of effectively absorbing liquid exudate from a wound to which it is applied and being capable of remaining dimensionally stable and tacky during such absorption.
Claim 3
Dependent Claim 17 words
The bandage as defined in claim 1 wherein said liquid phase comprises a solution of a polysaccharide.
Claim 4
Dependent Claim 18 words
The bandage as defined in claim 1 wherein said liquid phase comprises a hydric alcohol such as glycerol.
Claim 5
Dependent Claim 32 words
The bandage as defined in claim 1 wherein the solid phase of matrix includes a natural gum selected from the group comprising karaya gum, gum acacia, locust bean gum and guar gum.
Claim 6
Dependent Claim 14 words
The bandage as defined in claim 4 wherein said liquid phase comprises a glycerol.
Claim 7
Dependent Claim 35 words
The bandage as defined in claim 4 wherein said matrix is comprised of 10% to 40% by weight of karaya, 2% to 20% by weight of polyacrylamide, and 40% to 70% by weight of glycerol.
Claim 8
Dependent Claim 28 words
The bandage as defined in claim 1 wherein said matrix is comprised of 30% to 50% by weight of polyacrylamide and 50% to 70% by weight of glycerol.
Claim 9
Dependent Claim 36 words
The bandage as defined in claim 1 wherein said matrix if formed 2% to 25% by weight of polyacrylamide and 2% to 25% by weight of polyacrylic acid, and 40% to 70% by weight of glycerol.
Claim 10
Dependent Claim 29 words
The bandage as defined in claim 1 wherein said matrix if formed of 30% to 50% by weight of polyacrylic acid and 50% to 70% by weight of glycerol.

References Cited (Backward Citations)

US3249109A Cited
US3475363A Cited
US3612053A Cited
US3640741A Cited
US3946730A Cited
US3972995A Cited
AU495110B2 Cited
DE2919923A1 Cited
US4253460A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-12-21 1985-06-22 1985-12-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-12-21 1989-06-22 1989-12-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-12-21 1993-06-22 1993-12-22 $7700.00 Window Closed / Lapsed

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