US4288144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber submarine cable
Assignee: KDDI Corp
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Filing: 1980-01-25
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Granted: 1981-09-08
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Expires: 2000-01-25
Abstract
Abstract An optical fiber submarine cable, in which a high viscosity material of good wettability containing air gaps is filled in a space between an optical fiber cord having housed therein at least one coated optical fiber and a pressure resisting material layer having housed therein the optical fiber cord for protecting it from seawater pressure. The air gaps and the high viscosity material are arranged alternately with each other in the space at suitable intervals in the lengthwise direction of the cable. Alternatively, the air gaps are contained in the form of bubbles in the high viscosity material.
Inventors
- 👤 Taiichiro Nakai
- 👤 Kahei Furusawa
- 👤 Makoto Nunokawa
- 👤 Yoshihiro Ejiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:23
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4427
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
57 words
In an optical fiber submarine cable, the improvement comprising a high viscosity material of good wettability containing air gaps and filled in a space between an optical fiber cord having housed therein at least one coated optical fiber and a pressure resisting material layer having housed therein the optical fiber cord for protecting it from seawater pressure.
Claim 2
Dependent Claim
57 words
In an optical fiber submarine cable, the improvement comprising a high viscosity material of good wettability containing air gaps and filled in a space between an optical fiber cord having housed therein at least one coated optical fiber and a pressure resisting material layer having housed therein the optical fiber cord for protecting it from seawater pressure.
Claim 3
Dependent Claim
37 words
An optical fiber submarine cable according to claim 1, wherein the air gaps and the high viscosity material are arranged alternately with each other in the space at suitable intervals in the lengthwise direction of the cable.
Claim 4
Dependent Claim
25 words
An optical fiber submarine cable according to claim 1, wherein the air gaps are contained in the form of bubbles in the high viscosity material.
Claim 5
Dependent Claim
67 words
An optical fiber submarine cable, comprising: a coated optical fiber core; a pressure resistant layer surrounding said optical fiber core and extending along the length of said optical fiber core; and a highly wettable high viscosity material disposed between said optical fiber core and said pressure resistant layer and having air containing voids interspersed in the region between said optical fiber core and said pressure resistant layer.
Claim 6
Dependent Claim
67 words
An optical fiber submarine cable, comprising: a coated optical fiber core; a pressure resistant layer surrounding said optical fiber core and extending along the length of said optical fiber core; and a highly wettable high viscosity material disposed between said optical fiber core and said pressure resistant layer and having air containing voids interspersed in the region between said optical fiber core and said pressure resistant layer.
Claim 7
Dependent Claim
39 words
An optical fiber submarine cable according to claim 4, wherein said air containing voids are disposed spaced along the length of the cable with alternate regions of said highly wettable high viscosity material generally free of air containing voids.
Claim 8
Dependent Claim
37 words
An optical fiber submarine cable according to claim 4, wherein said air containing voids are disposed along the length of the cable with said air containing voids interspersed generally uniformly throughout said highly wettable high viscosity material.
Claim 9
Dependent Claim
23 words
An optical fiber submarine cable according to claim 5 or 6 wherein said coated optical fiber core is a coated optical multi-fiber cord.
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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |