Patent US4191743A successfully refreshed from Google Patents.
US4191743A
Expired / Lapsed
US
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Antibacterial wound dressing
Assignee: Merck Patent GmbH
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Filing: 1977-11-02
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Granted: 1980-03-04
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Expires: 1997-11-02
Abstract
Abstract Antibiotics can be effectively administered to wounds over long time periods by a wound dressing which comprises at least two layers of synthetic resin arranged one above the other and an intermediate layer composed of a synthetic resin granulate (particle size: 0.5-3mm) having an antibiotic incorporated therein.
Inventors
- 👤 Klaus Klemm
- 👤 Helmut Wahlig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:46
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/46; A61L2300/00; A61L2300/40; A61L2300/404; A61L2300/406
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A sterile wound dressing comprising two layers of synthetic resin arranged one above the other and an intermediate layer of an antibiotic within hardened, formed spheroids of a synthetic resin granulate, having a particle size of 0.5-3 mm., wherein the synthetic resin granulate comprises a copolymer of methacrylic acid methyl ester and methyl acrylate, and the antibiotic is selected from gentamycin, neomycin, kanamycin, tobramycin or other aminoglycoside antibiotics, erythromycin, lincomycin, clindamycin, novibiocin, vancomycin, fusidic acid, rifamycin, polymyxins, penicillins, and caphalosporins.
Claim 2
Dependent Claim
80 words
A sterile wound dressing comprising two layers of synthetic resin arranged one above the other and an intermediate layer of an antibiotic within hardened, formed spheroids of a synthetic resin granulate, having a particle size of 0.5-3 mm., wherein the synthetic resin granulate comprises a copolymer of methacrylic acid methyl ester and methyl acrylate, and the antibiotic is selected from gentamycin, neomycin, kanamycin, tobramycin or other aminoglycoside antibiotics, erythromycin, lincomycin, clindamycin, novibiocin, vancomycin, fusidic acid, rifamycin, polymyxins, penicillins, and caphalosporins.
Claim 3
Dependent Claim
19 words
The wound dressing of claim 1, wherein the synthetic resin granulate has a particle size of about 1 mm.
Claim 4
Dependent Claim
25 words
A wound dressing of claim 1, wherein the synthetic resin granulate is arranged as a closely packed layer between the layers of synthetic resin material.
Claim 5
Dependent Claim
11 words
The wound dressing of claim 1, wherein the antibiotic is gentamycin.
Claim 6
Dependent Claim
22 words
A method of administering an antibiotic to a wound which comprises dressing the wound with the sterile wound dressing of claim 1.
References Cited (Backward Citations)
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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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |