US4542957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics optical fibers
Assignee: Kaikiu Kogyo Co Ltd
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Filing: 1983-08-11
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Granted: 1985-09-24
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Expires: 2003-08-11
Abstract
Abstract Plastic optical fibers comprising as a core component a polymer predominantly containing methyl methacrylate and as a cladding component a copolymer lower in the refractive index than the core component, the plastics optical fibers being characterized by performing conjugate spinning with use of the cladding component which is vinylidene fluoride-tetrafluorethylene copolymer having incorporated therein 5 to 50% by weight of a polymer predominantly containing methyl methacrylate.
Inventors
- 👤 Kazuo Ishiwari
- 👤 Akira Ohmori
- 👤 Nobuyuki Tomihashi
- 👤 Sumiko Yuhara
- 👤 Toshikuni Kaino
- 👤 Kaname Jinguji
- 👤 Shigeo Nara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:12
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/10; B; B29; B29D; B29D11/00; B29D11/00663; B29C; B29C48/00; B29C48/03; B29C48/05
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
66 words
Plastic optical fibers comprising as a core component a polymer predominantly containing methyl methacrylate and as a cladding component a copolymer lower in the refractive index than the core component, the plastics optical fibers being characterized by performing conjugate spinning with use of the cladding component which is vinylidene fluoride-tetrafluoroethylene copolymer having incorporated therein 5 to 50% by weight of a polymer predominantly containing methyl methacrylate.
Claim 2
Dependent Claim
66 words
Plastic optical fibers comprising as a core component a polymer predominantly containing methyl methacrylate and as a cladding component a copolymer lower in the refractive index than the core component, the plastics optical fibers being characterized by performing conjugate spinning with use of the cladding component which is vinylidene fluoride-tetrafluoroethylene copolymer having incorporated therein 5 to 50% by weight of a polymer predominantly containing methyl methacrylate.
Claim 3
Dependent Claim
22 words
Plastics optical fibers as defined in claim 1 in which the vinylidene fluoride-tetrafluoroethylene copolymer contains 10 to 40 mole % of tetrafluoroethylene.
References Cited (Backward Citations)
US3930103A
Cited
US4381269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |