US5389442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water blocking strength members
Assignee: Furukawa Electric North America Inc
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Filing: 1992-11-25
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Granted: 1995-02-14
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Expires: 2012-11-25
Abstract
Abstract A communications cable (20) comprising a core (22) of at least one transmission media and a plastic jacket (34) includes provisions for preventing the movement of water within the cable. The cable includes a strength system (32) including longitudinally extending fibrous strength members (33-33) having a relatively high modulus and having water blocking provisions. In one embodiment, each fibrous strength member is treated with a superabsorbent liquid material which when dry fills interstices and covers portions of the exterior thereof. In another embodiment, a filamentary strand material comprising a water swellable fibrous material is wrapped about each fibrous strength member.
Inventors
- 👤 Candido J. Arroyo
- 👤 Jill B. Fluevog
- 👤 Krishnaswamy Kathiresan
- 👤 Parbhubhai D. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:18
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285; H01B7/288; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/443; G02B6/4432; G02B6/44384; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2971
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
A waterblocking strength member for use in an optical fiber communications cable, said waterblocking strength member comprising: an elongated, supple yarn which is impregnated with a superabsorbent material and which has a breaking strength greater than 400 Newtons.
Claim 2
Dependent Claim
38 words
A waterblocking strength member for use in an optical fiber communications cable, said waterblocking strength member comprising: an elongated, supple yarn which is impregnated with a superabsorbent material and which has a breaking strength greater than 400 Newtons.
Claim 3
Dependent Claim
16 words
The strength member of claim 1, wherein said superabsorbent material coats each filament of said yarn.
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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) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |