US4756599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber using vinylidene fluoride base ternary copolymer as cladding material
Assignee: Central Glass Co Ltd
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Filing: 1987-09-08
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Granted: 1988-07-12
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Expires: 2007-09-08
Abstract
Abstract The invention is an optical fiber having a core formed of either an inorganic glass or an organic polymer such as polymethyl methacrylate and a cladding layer formed of a ternary copolymer of vinylidene fluoride, hexafluoroacetone and either trifluoroethylene or tetrafluoroethylene. This cladding material is superior particularly in transparency and flexibility.
Inventors
- 👤 Kazuhiko Maeda
- 👤 Taku Yamauchi
- 👤 Toshio Koishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:35
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2967; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
An optical fiber comprising a solid cylindrical core and a cladding layer which is formed of a ternary copolymer of vinylidene fluoride, hexafluoroacetone and a fluoroethylene having 3 or 4 fluorine atoms.
Claim 2
Dependent Claim
32 words
An optical fiber comprising a solid cylindrical core and a cladding layer which is formed of a ternary copolymer of vinylidene fluoride, hexafluoroacetone and a fluoroethylene having 3 or 4 fluorine atoms.
Claim 3
Dependent Claim
31 words
An optical fiber according to claim 1, wherein said ternary copolymer is made up of 2-15 mol % of hexafluoroacetone, 0.5-40 mol % of trifluoroethylene and the balance of vinylidene fluoride.
Claim 4
Dependent Claim
20 words
An optical fiber according to claim 2, wherein the amount of said hexafluoroacetone is not less than 4 mol %.
Claim 5
Dependent Claim
31 words
An optical fiber according to claim 1, wherein said ternary copolymer is made up of 2-15 mol % of hexafluoroacetone, 5-60 mol % of tetrafluoroethylene and the balance of vinylidene fluoride.
Claim 6
Dependent Claim
20 words
An optical fiber according to claim 4, wherein the amount of said hexafluoroacetone is not less than 4 mol %.
Claim 7
Dependent Claim
16 words
An optical fiber according to claim 1, wherein said core is formed of an inorganic glass.
Claim 8
Dependent Claim
16 words
An optical fiber according to claim 1, wherein said core is formed of an organic polymer.
Claim 9
Dependent Claim
14 words
An optical fiber according to claim 7, wherein said organic polymer is polymethyl methacrylate.
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) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |