US5035484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing coated optical fiber
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1989-12-21
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Granted: 1991-07-30
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Expires: 2009-12-21
Abstract
Abstract A surface of an optical fiber is coated by a method for coating a surface of an optical fiber with carbon comprising steps of introducing an optical fiber in a reaction chamber containing a coating raw material comprising carbon, hydrogen and halogen atoms and depositing on the surface of the optical fiber a carbon layer formed from the raw material by chemical vapor deposition, whereby the coated optical fiber has improved initial tensile strength and absorbs less hydrogen.
Inventors
- 👤 Yoichi Ishiguro
- 👤 Masaharu Ooe
- 👤 Kohei Kobayashi
- 👤 Gotaro Tanaka
- 👤 Minoru Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:09
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/22; C03C25/223; C03C25/104; C03C25/106; C03C25/1061; C03C25/1062; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
41 words
An SiO 2 based glass optical fiber, a peripheral surface of which is coated with a carbon layer wherein a carbon atom in the carbon layer and the silicon oxide of the optical fiber are not chemically bonded with one another.
Claim 2
Dependent Claim
41 words
An SiO 2 based glass optical fiber, a peripheral surface of which is coated with a carbon layer wherein a carbon atom in the carbon layer and the silicon oxide of the optical fiber are not chemically bonded with one another.
Claim 3
Dependent Claim
21 words
The optical fiber according to claim 1, wherein the carbon layer has a resistivity of not larger than 8×10 -3 ohm.cm.
References Cited (Backward Citations)
EP0095729A2
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US4737379A
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EP0163457A2
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EP0222960A1
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EP0308143A1
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US4964694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |