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US5208426A
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US
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Shielded electric signal cable having a two-layer semiconductor jacket
Assignee: W.L. Gore and Associates Inc
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Filing: 1991-09-03
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Granted: 1993-05-04
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Expires: 2011-09-03
Abstract
Abstract A shielded electric signal cable having at least two semiconductive jacket layers of the same or differing conductivity to cover pinholes, meet variable electrical resistance specifications, and decrease signal transfer from jacket to shield.
Inventors
- 👤 Francis A. Kennedy
- 👤 John T. Mongan
- 👤 William G. Hardie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:49
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1834; H01B11/1839; H01B11/02; H01B11/06; H01B11/10; H01B11/1058; H01B11/1066; H01B11/1091
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A shielded electric signal cable comprising from inside to outside: (a) a conductive metal center conductor surrounded by an electrically insulating material; (b) at least one electrically conductive metal drain wire positioned along the length of said cable outside of said insulating material; (c) a layer of electrically conductive shielding material positioned around said center conductor, said insulating material, and said drain wires as a unit; and (d) at least two layers of semiconductive polymer jacketing surrounding the shielding material.
Claim 2
Dependent Claim
80 words
A shielded electric signal cable comprising from inside to outside: (a) a conductive metal center conductor surrounded by an electrically insulating material; (b) at least one electrically conductive metal drain wire positioned along the length of said cable outside of said insulating material; (c) a layer of electrically conductive shielding material positioned around said center conductor, said insulating material, and said drain wires as a unit; and (d) at least two layers of semiconductive polymer jacketing surrounding the shielding material.
Claim 3
Dependent Claim
22 words
A cable of claim 1 wherein the layers of at least two layers of the semiconductive polymer jacketing have different electrical conductivities.
Claim 4
Dependent Claim
14 words
A cable of claims 1 or 2, wherein said insulating material comprises expanded polytetrafluoroethylene.
Claim 5
Dependent Claim
40 words
A cable of claim 1, wherein said shielding material is selected from the group consisting of metal tape, conductively-filled polymer tape, inherently conductive polymer tape, and polymer tape having conductive layers coated on each side which are of different conductivity.
Claim 6
Dependent Claim
20 words
A cable of claims 1 or 2, wherein said semiconductive polymer jacketing includes at least one layer of thermoplastic fluorocarbon.
Claim 7
Dependent Claim
88 words
A shielded electric signal cable comprising from inside to outside: (a) a conductive metal center conductor surrounded by an electrically insulating material; (b) at least one electrically conductive metal drain wire positioned along the length of said cable outside of said insulating material; (c) a layer of polymer tape coated on both sides with an electrically conductive metal wrapped around said center conductor, said insulation, and said drain wires as a unit; and (d) at least two layers of semiconductive polymer jacketing surrounding the layer of polymer tape.
Claim 8
Dependent Claim
88 words
A shielded electric signal cable comprising from inside to outside: (a) a conductive metal center conductor surrounded by an electrically insulating material; (b) at least one electrically conductive metal drain wire positioned along the length of said cable outside of said insulating material; (c) a layer of polymer tape coated on both sides with an electrically conductive metal wrapped around said center conductor, said insulation, and said drain wires as a unit; and (d) at least two layers of semiconductive polymer jacketing surrounding the layer of polymer tape.
Claim 9
Dependent Claim
12 words
A cable of claim 6, wherein said insulating material comprises expanded polytetrafluoroethylene.
Claim 10
Dependent Claim
19 words
A cable of claim 7, wherein said polymer tape comprises thermoplastic polyester and said metal coated thereon comprises aluminum.
Claim 11
Dependent Claim
18 words
A cable of claim 8, wherein said semiconductive polymer jacketing includes at least one layer of thermoplastic fluorocarbon.
Claim 12
Dependent Claim
50 words
A shielded electric signal cable comprising from inside to outside: (a) a conductive metal center conductor surrounded by an electrically insulating material; (b) a shielding layer comprising metal wires around said center conductor and said insulating material as a unit; and (c) at least two layers of semiconductive polymer jacketing.
Claim 13
Dependent Claim
50 words
A shielded electric signal cable comprising from inside to outside: (a) a conductive metal center conductor surrounded by an electrically insulating material; (b) a shielding layer comprising metal wires around said center conductor and said insulating material as a unit; and (c) at least two layers of semiconductive polymer jacketing.
Claim 14
Dependent Claim
18 words
A cable of claim 10 wherein said shielding layer wires are served, spiralled or braided around said unit.
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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) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |