Patent US4679898A successfully refreshed from Google Patents.
US4679898A
Expired / Lapsed
US
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Signal transmission cable
Assignee: NKF Groep BV
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Filing: 1985-09-16
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Granted: 1987-07-14
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Expires: 2005-09-16
Abstract
Abstract A gas-tight and moisture-tight, mechanically strong signal transmission cable having a cable core and a cable sheath which comprises a metal tape folded around the core and having a minimum thickness of 100 μm, a layer of polyethylene adhering to the tape, a layer of polyamide-11 or polyamide-12, an armoring of reinforcing wires or tapes, and a synthetic resin outer sheath.
Inventors
- 👤 Albertus T. M. Grooten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:47
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4427; H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/29; H01B7/295
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
A signal transmission cable having a cable core of optical and/or electric conductors enveloped by a gas-tight and liquid-tight sheath, said sheath comprising, in the direction outwardly from said core, an overlapped layer of a metal tape of a thickness of at least 100 μm of aluminum or copper, a layer of a synthetic resin adhering to the surface of said metal tape remote from said core, and surrounding said metal tape, a layer of high-density polyethylene adhering to, and surrounding said synthetic resin layer, a layer of polyamide-11 or polyamide-12 provided on and surrounding said layer of polyethylene, an armoring of reinforcing wires or reinforcing tapes surrounding said layer of said polyamide and an outer sheath formed of a synthetic resin surrounding said armoring.
Claim 2
Dependent Claim
125 words
A signal transmission cable having a cable core of optical and/or electric conductors enveloped by a gas-tight and liquid-tight sheath, said sheath comprising, in the direction outwardly from said core, an overlapped layer of a metal tape of a thickness of at least 100 μm of aluminum or copper, a layer of a synthetic resin adhering to the surface of said metal tape remote from said core, and surrounding said metal tape, a layer of high-density polyethylene adhering to, and surrounding said synthetic resin layer, a layer of polyamide-11 or polyamide-12 provided on and surrounding said layer of polyethylene, an armoring of reinforcing wires or reinforcing tapes surrounding said layer of said polyamide and an outer sheath formed of a synthetic resin surrounding said armoring.
Claim 3
Dependent Claim
20 words
The signal transmission layer of claim 1 in which the outer sheath is formed of high-density polyethylene containing flame-retarding agents.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |