Patent US5189718A successfully refreshed from Google Patents.
US5189718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite cable containing light waveguides and electrical conductors
Assignee: Corning Research and Development Corp
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Filing: 1991-04-02
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Granted: 1993-02-23
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Expires: 2011-04-02
Abstract
Abstract Disclosed is a cable in which one tube holding light waveguides is connected by a plastic web to another tube holding metallic current carrying conductors. When buried in the earth, the cable may be located by means of a magnetic field produced by the current carrying conductors, but the cable retains the advantage of the tube carrying the light waveguides being dielectric.
Inventors
- 👤 Michael J. Barrett
- 👤 Andrew S. Dodd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:03
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/005; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4417; G02B6/4429; G02B6/443; G02B6/4432
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
A cable containing light waveguides and electrical conductors, comprising: (a) a first tube containing a plurality of current carrying electrical conductors; (b) a second tube containing at least one strength member and a plurality of light waveguides; and, (c) a web extending between the first and second tubes, said web having a thickness narrower than half the outer diameter of the first tube or the second tube.
Claim 2
Dependent Claim
67 words
A cable containing light waveguides and electrical conductors, comprising: (a) a first tube containing a plurality of current carrying electrical conductors; (b) a second tube containing at least one strength member and a plurality of light waveguides; and, (c) a web extending between the first and second tubes, said web having a thickness narrower than half the outer diameter of the first tube or the second tube.
Claim 3
Dependent Claim
16 words
A cable as recited in claim 1, wherein the second tube and its contents are dielectric.
Claim 4
Dependent Claim
75 words
A cable containing light waveguides and electrical conductors, comprising: (a) a first tube containing a plurality of current carrying electrical conductors and a tubular metallic shield disposed between the electrical conductors and the first tube; (b) a second tube containing a plurality of light waveguides; and, (c) a web extending between the first and second tubes, said web having a thickness narrower than half the outer diameter of the first tube or the second tube.
Claim 5
Dependent Claim
75 words
A cable containing light waveguides and electrical conductors, comprising: (a) a first tube containing a plurality of current carrying electrical conductors and a tubular metallic shield disposed between the electrical conductors and the first tube; (b) a second tube containing a plurality of light waveguides; and, (c) a web extending between the first and second tubes, said web having a thickness narrower than half the outer diameter of the first tube or the second tube.
Claim 6
Dependent Claim
16 words
A cable as recited in claim 3, wherein the second tube and its contents are dielectric.
Claim 7
Dependent Claim
81 words
A cable containing light waveguides and electrical conductors, comprising: (a) a first tube containing a plurality of current carrying electrical conductors and a tubular metallic shield disposed between the electrical conductors and the first tube; (b) a second tube containing at least one strength member and a plurality of light waveguides; and, (c) a web extending between the first and second tubes, said web having a thickness narrower than half the outer diameter of the first tube or the second tube.
Claim 8
Dependent Claim
81 words
A cable containing light waveguides and electrical conductors, comprising: (a) a first tube containing a plurality of current carrying electrical conductors and a tubular metallic shield disposed between the electrical conductors and the first tube; (b) a second tube containing at least one strength member and a plurality of light waveguides; and, (c) a web extending between the first and second tubes, said web having a thickness narrower than half the outer diameter of the first tube or the second tube.
Claim 9
Dependent Claim
16 words
A cable as recited in claim 5, wherein the second tube and its contents are dielectric.
References Cited (Backward Citations)
US4423306A
Cited
US4856867A
Cited
US4761053A
Cited
US4763983A
Cited
US4852965A
Cited
EP0321278A1
Cited
US4952020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-23 | 1996-08-24 | 1997-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-23 | 2000-08-24 | 2001-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-23 | 2004-08-24 | 2005-02-23 | $7700.00 | Window Closed / Lapsed |