Patent US4549187A successfully refreshed from Google Patents.
US4549187A
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Metallic coated and lubricated amorphous silica yarn used as a mesh antenna reflector
Assignee: Lockheed Martin Corp
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Filing: 1982-04-05
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Granted: 1985-10-22
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Expires: 2002-04-05
Abstract
Abstract This invention relates to an antenna material and more particularly to an antenna material comprising, in its preferred embodiment, a woven mesh of amorphous silica fibers, a conductive metal coating on at least the outer surfaces of the mesh and a lubricant covering and adhering to non-metallized surfaces of the silica fibers.
Inventors
- 👤 Donald J. Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:27
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/141; H01Q15/142; Y; Y10; Y10S; Y10S57/00; Y10S57/901; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2956; Y10T428/2958
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
59 words
An antenna material comprising a plurality of amorphous silica yarns in a mesh configuration, each of said yarns consisting of a multiplicity of silica fibers, an electrtically conductive metal coating on at least the outer surfaces of said yarns and a surfactant-containing lubricant covering and adhering to at least the non-metallized surfaces of said silica fibers in said yarns.
Claim 2
Dependent Claim
59 words
An antenna material comprising a plurality of amorphous silica yarns in a mesh configuration, each of said yarns consisting of a multiplicity of silica fibers, an electrtically conductive metal coating on at least the outer surfaces of said yarns and a surfactant-containing lubricant covering and adhering to at least the non-metallized surfaces of said silica fibers in said yarns.
Claim 3
Dependent Claim
23 words
A material in accordance with claim 1 wherein said conductive coating has a surface electrical resistivity of 2 ohms or less per square.
Claim 4
Dependent Claim
23 words
A material in accordance with claim 2 wherein the conductive coating is selected from the group consisting of copper, silver, gold and aluminum.
Claim 5
Dependent Claim
21 words
A material in accordance with claim 1 wherein said lubricant is a low volatility liquid whose volatile portion is largely noncondensible.
Claim 6
Dependent Claim
14 words
A material in accordance with claim 4 wherein said lubricant is a fluorinated polyether.
Claim 7
Dependent Claim
21 words
A material in accordance with claim 4 wherein said lubricant is present in an amount up to 12 percent by weight.
Claim 8
Dependent Claim
12 words
A material in accordance with claim 1 wherein said surfactant is octyl-phenoxy-ethanol.
Claim 9
Dependent Claim
25 words
A material in accordance with claim 7 wherein said surfactant is present in an amount from about 0.01 percent to about 1 percent by weight.
Claim 10
Dependent Claim
48 words
A material in accordance with claim 4 wherein said low volatility liquid has less than 1 percent weight loss and less than 0.1 percent vacuum condensible material (on a 25° C. cold plate) when heated at 126° C. for 24 hours in a vacuum of 10 -5 TORR.
Claim 11
Dependent Claim
54 words
A material useful for forming an antenna mesh reflector comprising an amphorous silica yarn having a multiplicity of silica fibers, an electrically conductive metal coating on at least the outer surface of said yarn and a surfactant-containing lubricant covering and adhering to at least the non-metallized surfaces of said silica fibers in said yarn.
Claim 12
Dependent Claim
54 words
A material useful for forming an antenna mesh reflector comprising an amphorous silica yarn having a multiplicity of silica fibers, an electrically conductive metal coating on at least the outer surface of said yarn and a surfactant-containing lubricant covering and adhering to at least the non-metallized surfaces of said silica fibers in said yarn.
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) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |