US4557965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camouflage controlling reflection of both long and short radar waves
Assignee: Diab Barracuda AB
•
Filing: 1984-04-05
•
Granted: 1985-12-10
•
Expires: 2004-04-05
Abstract
Abstract Camouflage material incorporates means for specifying and providing predetermined degree of reflection of incident radar waves which is optimum for particular use environments. The overall pattern is the resultant of control of reflection of longer radar wavelengths by a layer of electrically conductive fibrils of controlled density and reflection of shorter radar wavelengths by thin mosaic layer of metal.
Inventors
- 👤 Lars Karlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:03
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/005; B; B32; B32B; B32B27/00; B32B27/12; B32B27/32; B32B7/00; B32B7/04; B32B7/12; B32B2255/00; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/20; B32B2307/202; B32B2323/00; B32B2323/04; Y; Y10; Y10S; Y10S2/00; Y10S2/90; Y10S428/00; Y10S428/919; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/2481; Y10T428/24917; Y10T442/00; Y10T442/30; Y10T442/3146; Y10T442/3171; Y10T442/60; Y10T442/637; Y10T442/642
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
153 words
Camouflage material comprising a laminate including a supporting layer therein substantially coextensive with said camouflage material, a polymer layer disposed at the ultimately exteriorly exposed side of said camouflage material, said polymer layer having a matte outer surface, and embodying means for reflecting incident radar waves throughout the radar electromagnetic spectrum to a predetermined extent with respect to the respective wavelength ranges within said spectrum, said means comprising electrically conductive fibrils arranged within said means for reflecting radar waves and distributed throughout an area substantially coextensive with said supporting layer and supported thereby and a thin layer of cracked metal substantially coextensive with and supported upon said polymer layer, said thin layer of crackled metal being glued to said support layer, the density of said fibrils being such that in combination with said layer of crackled metal a predetermined degree of reflection of incident radar waves is attained throughout the radar electromagnetic spectrum.
Claim 2
Dependent Claim
153 words
Camouflage material comprising a laminate including a supporting layer therein substantially coextensive with said camouflage material, a polymer layer disposed at the ultimately exteriorly exposed side of said camouflage material, said polymer layer having a matte outer surface, and embodying means for reflecting incident radar waves throughout the radar electromagnetic spectrum to a predetermined extent with respect to the respective wavelength ranges within said spectrum, said means comprising electrically conductive fibrils arranged within said means for reflecting radar waves and distributed throughout an area substantially coextensive with said supporting layer and supported thereby and a thin layer of cracked metal substantially coextensive with and supported upon said polymer layer, said thin layer of crackled metal being glued to said support layer, the density of said fibrils being such that in combination with said layer of crackled metal a predetermined degree of reflection of incident radar waves is attained throughout the radar electromagnetic spectrum.
Claim 3
Dependent Claim
28 words
Camouflage material in accordance with claim 1 wherein said supporting layer comprises a woven fabric of multifilament thread and said electrically conductive fibrils are contained within said thread.
Claim 4
Dependent Claim
14 words
Camouflage material in accordance with claim 2 wherein said thread is composed of polyamide.
Claim 5
Dependent Claim
22 words
Camouflage material in accordance with claim 2 wherein a predetermined portion only of said thread contains said electrically conductive fibrils incorporated therein.
Claim 6
Dependent Claim
32 words
Camouflage material in accordance with claim 1 wherein said fibrils are present as a haphazard array of fibrils secured between said one of said supporting layers and said layer of crackled metal.
Claim 7
Dependent Claim
20 words
Camouflage material in accordance with claim 5 wherein said one of said supporting layers is a film of polyvinyl chloride.
Claim 8
Dependent Claim
16 words
Camouflage material in accordance with claim 1 wherein said electrically conductive fibrils are composed of steel.
Claim 9
Dependent Claim
16 words
Camouflage material in accordance with claim 1 wherein said electrically conductive fibrils are composed of carbon.
Claim 10
Dependent Claim
18 words
Camouflage material in accordance with claim 1 wherein said electrically conductive fibrils are composed of metalized plastic fibers.
Claim 11
Dependent Claim
171 words
Camouflage material comprising a laminate including a supporting layer, said supporting layer comprising a first polymer layer disposed at the ultimately interiorly exposed side of said camouflage material, said first polymer layer having a matte outer surface and extending substantially coextensive with said camouflage material, a second polymer layer disposed at the ultimately exteriorly exposed side of said camouflage material, said second polymer layer having a matte outer surface, and embodying means for reflecting incident radar waves throughout the radar electromagnetic spectrum to a predetermined extent with respect to the respective wavelength ranges within said spectrum, said means comprising electrically conductive fibrils distributed on said supporting layer and supported thereby, and a thin layer of crackled metal substantially coextensive with and supported upon said second polymer layer, said thin layer of metal being glued to the supporting layer, the density of said distributed fibrils being such that in combination with said layer of crackled metal a predetermined degree of reflection of incident radar waves is attained throughout the radar electromagnetic spectrum.
Claim 12
Dependent Claim
171 words
Camouflage material comprising a laminate including a supporting layer, said supporting layer comprising a first polymer layer disposed at the ultimately interiorly exposed side of said camouflage material, said first polymer layer having a matte outer surface and extending substantially coextensive with said camouflage material, a second polymer layer disposed at the ultimately exteriorly exposed side of said camouflage material, said second polymer layer having a matte outer surface, and embodying means for reflecting incident radar waves throughout the radar electromagnetic spectrum to a predetermined extent with respect to the respective wavelength ranges within said spectrum, said means comprising electrically conductive fibrils distributed on said supporting layer and supported thereby, and a thin layer of crackled metal substantially coextensive with and supported upon said second polymer layer, said thin layer of metal being glued to the supporting layer, the density of said distributed fibrils being such that in combination with said layer of crackled metal a predetermined degree of reflection of incident radar waves is attained throughout the radar electromagnetic spectrum.
Claim 13
Dependent Claim
16 words
Camouflage material in accordance with claim 10 wherein said electrically conductive fibrils are composed of steel.
Claim 14
Dependent Claim
16 words
Camouflage material in accordance with claim 10 wherein said electrically conductive fibrils are composed of carbon.
Claim 15
Dependent Claim
18 words
Camouflage material in accordance with claim 10 wherein said electrically conductive fibrils are composed of metalized plastic fibers.
Claim 16
Dependent Claim
182 words
Camouflage material comprising a laminate including a supporting layer therein substantially coextensive with said camouflage material, a first polymer layer disposed at the ultimately exteriorly exposed side of said camouflage material, said first polymer layer having a matte outer surface, second and third polymer layers applied to opposite sides of said supporting layer, said third polymer layer having a matte outer surface, said camouflage material embodying means for reflecting incident radar waves throughout the radar electromagnetic spectrum to a predetermined extent with respect to the respective wavelength ranges within said spectrum, said means comprising electrically conductive fibrils arranged within said means for reflecting radar waves and distributed throughout an area substantially coextensive with said supporting layer and supported thereby and a thin layer of crackled metal substantially coextensive with and supported upon said first polymer layer, said thin layer of crackled metal being glued to the second polymer layer, the density of said distributed fibrils being such that in combination with said layer of crackled metal a predetermined degree of reflection of incident radar waves is attained throughout the radar electromagnetic spectrum.
Claim 17
Dependent Claim
182 words
Camouflage material comprising a laminate including a supporting layer therein substantially coextensive with said camouflage material, a first polymer layer disposed at the ultimately exteriorly exposed side of said camouflage material, said first polymer layer having a matte outer surface, second and third polymer layers applied to opposite sides of said supporting layer, said third polymer layer having a matte outer surface, said camouflage material embodying means for reflecting incident radar waves throughout the radar electromagnetic spectrum to a predetermined extent with respect to the respective wavelength ranges within said spectrum, said means comprising electrically conductive fibrils arranged within said means for reflecting radar waves and distributed throughout an area substantially coextensive with said supporting layer and supported thereby and a thin layer of crackled metal substantially coextensive with and supported upon said first polymer layer, said thin layer of crackled metal being glued to the second polymer layer, the density of said distributed fibrils being such that in combination with said layer of crackled metal a predetermined degree of reflection of incident radar waves is attained throughout the radar electromagnetic spectrum.
Claim 18
Dependent Claim
28 words
Camouflage material in accordance with claim 14 wherein said supporting layer comprises a woven fabric of multifilament thread and said electrically conductive fibrils are contained within said thread.
Claim 19
Dependent Claim
14 words
Camouflage material in accordance with claim 15 wherein said threads are composed of polyamide.
Claim 20
Dependent Claim
22 words
Camouflage material in accordance with claim 15 wherein a predetermined portion only of said thread contains said electrically conductive fibrils incorporated therein.
Claim 21
Dependent Claim
29 words
Camouflage material in accordance with claim 14 wherein said fibrils are present as a haphazard array of fibrils secured between said supporting layer and said layer of crackled metal.
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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |