Patent US4623951A successfully refreshed from Google Patents.
US4623951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive composite structure
Assignee: The AT&T MVPD Group LLC
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Filing: 1984-08-13
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Granted: 1986-11-18
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Expires: 2004-08-13
Abstract
Abstract Conductive coating (20) is a thorough mixture of 0.03 parts per weight of carbon black together with 0.003 to 0.01 parts per weight of wetting agent and 20 parts of solvent, and further mixing in by low shearing mixing 1/2 to 1 part per weight of thermosetting resin. This is then sprayed into place on the substrate and thermoset. In this particular case, the substrate is exterior face sheet (12) of honeycomb structure (10) which may serve as part of a spacecraft, to electrically conduct away surface charges.
Inventors
- 👤 Preston S. DuPont
- 👤 Robert E. Ritter
- 👤 John P. Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:24
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; B64G1/54; C; C04; C04B; C04B14/00; C04B14/02; C04B14/022; C04B41/00; C04B41/45; C04B41/50; C04B41/5001; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24165; Y10T428/31504; Y10T428/31511; Y10T428/31551; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
103 words
The combination comprising: An electrically conductive coating; a pervious insulative substrate carrying said coating; a metallic support supporting said substrate; said coating comprising a mixture of carbon black particles and a coupling agent mixed in a thermoset synthetic dielectric polymer coated on the insulative substrate with enough of said carbon black particles in electric contact with each other in the mixture to form an electrical discharge path in said polymer, said coating having a resistance of substantially 6×10 5 ohms per square, said coating extending through openings in said pervious insulated substrate to be in contact with and electrically connected to said support.
Claim 2
Dependent Claim
103 words
The combination comprising: An electrically conductive coating; a pervious insulative substrate carrying said coating; a metallic support supporting said substrate; said coating comprising a mixture of carbon black particles and a coupling agent mixed in a thermoset synthetic dielectric polymer coated on the insulative substrate with enough of said carbon black particles in electric contact with each other in the mixture to form an electrical discharge path in said polymer, said coating having a resistance of substantially 6×10 5 ohms per square, said coating extending through openings in said pervious insulated substrate to be in contact with and electrically connected to said support.
Claim 3
Dependent Claim
32 words
The coating of claim 1 wherein the coating contains for each part by weight of the thermoset polymer: 0.003 to 0.01 parts of coupling agent and about 0.03 parts of carbon black.
Claim 4
Dependent Claim
12 words
The coating of claim 2 wherein the carbon black is acetylene black.
Claim 5
Dependent Claim
22 words
The coating of claim 3 wherein the polymer resin is selected from the resin group consisting of epoxy resin and silicone resin.
Claim 6
Dependent Claim
41 words
The coating of claim 1 wherein said substrate is a woven substrate and the coating penetrates through said substrate to said support to provide an electrically conductive path from the surface of the coating through to said support of said substrate.
Claim 7
Dependent Claim
13 words
The coating of claim 5 wherein the woven fabric is an aramid fabric.
Claim 8
Dependent Claim
15 words
The coating of claim 5 wherein the support for said substrate is a metallic honeycomb.
Claim 9
Dependent Claim
16 words
The coating of claim 1 wherein said substrate is a synthetic polymer composition material film substrate.
Claim 10
Dependent Claim
145 words
The combination comprising: an electrically conductive exposed coating layer together with an otherwise dielectric external surface of a spacecraft carrying said layer and a metallic support electrically connected to said external surface; said external surface of a spacecraft being a dielectric woven face fabric coupled to metallic honeycomb core; said coating comprising a mixture of carbon black particles in a thermoset dielectric synthetic polymer resin on the surface, with enough of said carbon black particles in electric contact with each other to form an electric discharge path in said polymer; said coating having a resistance of substantially 6×10 5 ohms per square, said coating layer being coated on and extending through said woven face fabric to said metallic honeycomb core to be electrically connected to the spacecraft ground of the metallic support to discharge surface potential acquired from the charged particle environment of the spacecraft.
Claim 11
Dependent Claim
145 words
The combination comprising: an electrically conductive exposed coating layer together with an otherwise dielectric external surface of a spacecraft carrying said layer and a metallic support electrically connected to said external surface; said external surface of a spacecraft being a dielectric woven face fabric coupled to metallic honeycomb core; said coating comprising a mixture of carbon black particles in a thermoset dielectric synthetic polymer resin on the surface, with enough of said carbon black particles in electric contact with each other to form an electric discharge path in said polymer; said coating having a resistance of substantially 6×10 5 ohms per square, said coating layer being coated on and extending through said woven face fabric to said metallic honeycomb core to be electrically connected to the spacecraft ground of the metallic support to discharge surface potential acquired from the charged particle environment of the spacecraft.
Claim 12
Dependent Claim
25 words
The combination of claim 9 wherein said thermoset synthetic polymer resin is selected from the group consisting of epoxy resin urethane resin and silicone resin.
Claim 13
Dependent Claim
13 words
The combination of claim 10 further including a coupling agent in the coating.
Claim 14
Dependent Claim
32 words
The combination of claim 11 wherein the coating contains for each part by weight of the thermoset polymer: 0.003 to 0.01 parts of coupling agent and about 0.03 parts of carbon black.
Claim 15
Dependent Claim
12 words
The combination of claim 12 wherein the carbon black is acetylene black.
Claim 16
Dependent Claim
12 words
The combination of claim 10 wherein the carbon black is acetylene black.
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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) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |