US4064305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knitted camouflage material
Assignee: Barracudaverken AB
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Filing: 1976-11-08
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Granted: 1977-12-20
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Expires: 1996-11-08
Abstract
Abstract A base fabric for a radar defeating camouflage material comprising a knitted fabric knitted from a plurality of strands to form a stretchable, flexible fabric having a plurality of openings therethrough, each of these strands constituting a spun mixture of noncontinuous polymeric fibers and noncontinuous metal or carbon fibers. The fibers can be nylon or polyester. The metal fibers can be stainless steel. The metal or carbon fibers can comprise about 2 - 10 percent by weight of the spun yarn, the fibers having an average diameter between about 0.008 and 0.02 millimeters and an average length between about 50 millimeters and 90 millimeters.
Inventors
- 👤 Erik W. Wallin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:40
CPC Classifications
D; D04; D04B; D04B1/00; D04B1/14; F; F41; F41H; F41H3/00; F41H3/02; D10; D10B; D10B2403/00; D10B2403/01; D10B2403/012; D10B2403/0122; D10B2507/00; Y; Y10; Y10S; Y10S2/00; Y10S2/90; Y10S428/00; Y10S428/902; Y10S428/919; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/2481; Y10T428/24818; Y10T428/29; Y10T428/2904; Y10T428/2913; Y10T428/2915; Y10T428/2933; Y10T428/294; Y10T442/00; Y10T442/40; Y10T442/425
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
An improved radar-defeating, flexible camouflage material comprising a base fabric comprising a plurality of strands of spun yarn knitted together to form a stretchable, flexible, substantially planar fabric having a plurality of openings therethrough, each of said strands comprising a spun mixture of polymeric fibers and noncontinuous electrically conductive fibers with said conductive fibers comprising about 2 to 10 percent of the spun yarn, by weight to cause said base fabric to exhibit radar reflectance characteristics similar to its natural surrounding environment; a first flexible film covering and adhered to one surface of said fabric, and a second flexible film covering and adhered to the other surface of said fabric, said first and second films being adhered to each other through said openings in said fabric.
Claim 2
Dependent Claim
126 words
An improved radar-defeating, flexible camouflage material comprising a base fabric comprising a plurality of strands of spun yarn knitted together to form a stretchable, flexible, substantially planar fabric having a plurality of openings therethrough, each of said strands comprising a spun mixture of polymeric fibers and noncontinuous electrically conductive fibers with said conductive fibers comprising about 2 to 10 percent of the spun yarn, by weight to cause said base fabric to exhibit radar reflectance characteristics similar to its natural surrounding environment; a first flexible film covering and adhered to one surface of said fabric, and a second flexible film covering and adhered to the other surface of said fabric, said first and second films being adhered to each other through said openings in said fabric.
Claim 3
Dependent Claim
12 words
A camouflage according to claim 1 wherein said polymeric fibers are nylon.
Claim 4
Dependent Claim
36 words
A camouflage material according to claim 1 wherein said electrically conductive fibers are stainless steel fibers each having a diameter of about 0.008 millimeters and an average length between about 60 millimeters and about 80 millimeters.
Claim 5
Dependent Claim
17 words
A camouflage material according to claim 1 wherein said electrically conductive fibers are fibers of elemental carbon.
Claim 6
Dependent Claim
17 words
A camouflage material according to claim 1 wherein said first and second flexible films comprise polyvinyl chloride.
Claim 7
Dependent Claim
18 words
A camouflage material according to claim 5 wherein said first and second flexible films further comprise a pigment.
Claim 8
Dependent Claim
12 words
A fabric according to claim 1 wherein said polymeric fibers are polyamide.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |