US3932602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-stinging wound dressing
Assignee: Novitas Nuprot SA
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Filing: 1973-12-13
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Granted: 1976-01-13
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Expires: 1993-12-13
Abstract
Abstract This invention is concerned with a non-stinging wound dressing. This wound dressing is characterized by plastics dissolved in a solvent system of stinging and non-stinging solvent, the combination of which provides a non-stinging solvent system with sufficient polarity to dissolve the plastic. This wound dressing is preferrably applied to wounds as an aerosol spray dressing containing bacteriostatic agents.
Inventors
- 👤 Ulf Alan Sweger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
A; A61; A61L; A61L26/00; A61L26/0061; A61L26/0076
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
In an aerosol wound dressing of the type having in an aerosol spray container pressurized with dichlorodifluoromethane, 1,1,2-trichloro-1,2,2-trifluoroethane, or trichlorofluoromethane which contains a film forming plastic material selected from the group consisting of N-butyl methacrylate, isobutyl methacrylate, 2-ethoxyethyl methacrylate, methyl methacrylate, 2-ethoxyethyl methacrylate/methyl methacrylate(90/10 copolymer), N-butyl methacrylate/isobutyl methacrylate(50/50 copolymer), or N-butyl methacrylate/methyl methacrylate(80/20 copolymer) in a solvent system, the improvement which comprises a solvent system having sym-tetrachlorodifluoroethane alone or at least 50% sym-tetrachlorodifluoroethane in combination with methanol, ethanol, acetone, methyl ethyl ketone, ethyl acetate, or amyl acetate; said improvement rendering the aerosol wound dressing non-stinging.
Claim 2
Dependent Claim
95 words
In an aerosol wound dressing of the type having in an aerosol spray container pressurized with dichlorodifluoromethane, 1,1,2-trichloro-1,2,2-trifluoroethane, or trichlorofluoromethane which contains a film forming plastic material selected from the group consisting of N-butyl methacrylate, isobutyl methacrylate, 2-ethoxyethyl methacrylate, methyl methacrylate, 2-ethoxyethyl methacrylate/methyl methacrylate(90/10 copolymer), N-butyl methacrylate/isobutyl methacrylate(50/50 copolymer), or N-butyl methacrylate/methyl methacrylate(80/20 copolymer) in a solvent system, the improvement which comprises a solvent system having sym-tetrachlorodifluoroethane alone or at least 50% sym-tetrachlorodifluoroethane in combination with methanol, ethanol, acetone, methyl ethyl ketone, ethyl acetate, or amyl acetate; said improvement rendering the aerosol wound dressing non-stinging.
Claim 3
Dependent Claim
32 words
As in claim 1, a non-stinging aerosol spray wound dressing comprising: 0.1% amylacetate 0.47% ethylacetate 3.24% 2-ethoxyethylmethacrylate 0.01% methylmethacrylate 7.22% sym-tetrachlorodifluoroethane 26.00% 1,1,2-trichloro-1,2,2-trifluoroethane 39.00% trifluorochloromethane 24.00% difluorochloromethane in an aerosol spray container.
Claim 4
Dependent Claim
15 words
As in claim 1, a non-stinging aerosol spray wound dressing further comprising .003% 2,4,4'-trichloro-2'-hydroxydiphenyl ether.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |