US4437729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fibre cables
Assignee: Alcatel Submarine Systems BV
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Filing: 1981-06-17
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Granted: 1984-03-20
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Expires: 2001-06-17
Abstract
Abstract An optical fibre submarine cable is made by extruding a metallic pressure tube by a friction extrusion technique, compressing the tube, applying tensile strength members, applying a conductive tape over the strength members and extruding plastic dielectric material over the tape. Armoring can subsequently be applied for shallow water application.
Inventors
- 👤 Colin S. Parfree
- 👤 Peter Worthington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:05
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4427; G02B6/4428; G02B6/4479; G02B6/4486; G02B6/4488; G02B6/449
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
An optical fibre cable comprising in combination an optical fibre, a closed metallic tubular conductor surrounding said optical fibre, said closed tubular conductor being formed from a pre-sized C-section tube, a tensile strength member surrounding said closed tubular conductor, copper tape disposed on the outside of said tensile strength member, a dielectric layer surrounding said copper tape, and a sheath disposed on the outside of said dielectric layer.
Claim 2
Dependent Claim
68 words
An optical fibre cable comprising in combination an optical fibre, a closed metallic tubular conductor surrounding said optical fibre, said closed tubular conductor being formed from a pre-sized C-section tube, a tensile strength member surrounding said closed tubular conductor, copper tape disposed on the outside of said tensile strength member, a dielectric layer surrounding said copper tape, and a sheath disposed on the outside of said dielectric layer.
Claim 3
Dependent Claim
18 words
An optical fibre according to claim 1 further including armoring wires disposed on the outside of said sheath.
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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |