Patent US5058987A successfully refreshed from Google Patents.
US5058987A
Expired / Lapsed
US
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Coated optical fiber
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1990-06-27
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Granted: 1991-10-22
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Expires: 2010-06-27
Abstract
Abstract An optical fiber comprising a glass optical fiber and a rigid protective layer which is coated directly on the glass fiber wherein a constricting force F generated by the protective layer is from -0.05 kg to +0.05 kg when the force F is defined by the following equation: ##EQU1## which has improved transmission performances.
Inventors
- 👤 Toshifumi Hosoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:39
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4402; C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; G02B6/4429; G02B6/443
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
47 words
An optical fiber comprising: a glass optical fiber; and a rigid protective layer coated directly on the glass fiber; wherein a constricting force F generated by the protective layer is from -0.05 kg to 0.05 kg where the force F is defined by the following equation: ##EQU4##
Claim 2
Dependent Claim
47 words
An optical fiber comprising: a glass optical fiber; and a rigid protective layer coated directly on the glass fiber; wherein a constricting force F generated by the protective layer is from -0.05 kg to 0.05 kg where the force F is defined by the following equation: ##EQU4##
Claim 3
Dependent Claim
18 words
The optical fiber according to claim 1, wherein said constricting force F is from -0.02 to +0.02 kg.
Claim 4
Dependent Claim
54 words
The optical fiber according to claim 1, wherein said protective layer is formed from a resin selected from the group consisting of UV curable urethane-acrylate resins, UV curable epoxy-acrylate resins, UV curable silicone-acrylate resins, UV curable silicone resins, UV curable polyimide resins, thermosetting silicone resins, thermosetting ladder type silicone resins and thermosetting polyimide resins.
Claim 5
Dependent Claim
14 words
The optical fiber according to claim 1, which is a single mode optical fiber.
Claim 6
Dependent Claim
15 words
The optical fiber according to claim 1, which is a graded index type optical fiber.
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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) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |