US4564263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing plastic optical fiber
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1984-05-08
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Granted: 1986-01-14
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Expires: 2004-05-08
Abstract
Abstract A process for producing a plastic optical fiber which consists of a core made of a homo- or co-polymer of alkyl methacrylate and a cladding made of a fluorine-containing polymer, which process comprising forming the cladding around the core and irradiating the optical fiber with an electron beam, the optical fiber produced by the process being used at a temperature higher than 80 DEG C. without significant loss of light transmission.
Inventors
- 👤 Yoshinobu Ueba
- 👤 Shinichi Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:38
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; G; G02; G02B; G02B1/00; G02B1/04; G02B1/045; B29C48/00; B29C48/03; B29C48/05; B29K; B29K2027/00; B29K2027/12; B29K2033/00; B29K2033/04; B29L; B29L2011/00; B29L2011/0075
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
48 words
A process for producing a plastic optical fiber which consists of a core made of a homo- or co-polymer of alkyl methacrylate and a cladding made of a fluorine-containing polymer, which process comprises forming the cladding around the core and irradiating the optical fiber with an electron beam.
Claim 2
Dependent Claim
48 words
A process for producing a plastic optical fiber which consists of a core made of a homo- or co-polymer of alkyl methacrylate and a cladding made of a fluorine-containing polymer, which process comprises forming the cladding around the core and irradiating the optical fiber with an electron beam.
Claim 3
Dependent Claim
17 words
The process according to claim 1, wherein a core is made of a homopolymer of alkyl methacrylate.
Claim 4
Dependent Claim
43 words
The process according to claim 1, wherein the core is made of a copolymer of alkyl methacrylate with at least one comonomer selected from the group consisting of phenyl methacrylate, benzyl methacrylate, naphthyl methacrylate, p-phenylstyrene, p-tert-butylstyrene, p-cyanostyrene, p-iodostyrene, α,β,β-trifluorostyrene, perfluorostyrene and 2,3,4 5,6-pentafluorostyrene.
Claim 5
Dependent Claim
32 words
The process according to claim 1, wherein alkyl methacrylate is one selected from the group consisting of methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, bornyl methacrylate, isobornyl methacrylate and adamantyl methacrylate.
Claim 6
Dependent Claim
12 words
The process according to claim 4, wherein alkyl methacrylate is methyl methacrylate.
Claim 7
Dependent Claim
16 words
The process according to claim 1, wherein the fluorine-containing polymer is a copolymer of vinylidene fluoride.
Claim 8
Dependent Claim
38 words
The according to claim 6, wherein the fluorine-containing polymer is one selected form the group consisiting of a vinylidene fluoride/tetrafluoroethylene copolymer, a vinylidene fluoride/trifluoroethylene copolymer, a vinylidene fluoride/hexafluoropropylene copolymer, a vinylidene fluoride/trifluoroethylene/tetrafluoroethylene terpolymer and a vinylidene fluoride/tetrafluoroethylene/hexafluoropropylene terpolymer.
Claim 9
Dependent Claim
18 words
The process according to claim 1, wherein the fluorine-containing polymer is a homo- or co-polymer of fluoroalkyl methacrylate.
Claim 10
Dependent Claim
27 words
The process according to claim 1, wherein the fluorine-containing polymer is a blend of the copolymer of vinylidene fluoride and the homo- or co-polymer of fluoroalkyl methacrylate.
Claim 11
Dependent Claim
19 words
The process according to claim 1, wherein electron dose is less than 15 Mrad, preferably less than 10 Mrad.
Claim 12
Dependent Claim
14 words
The plastic optical fiber which is produced by a process according to claim 1.
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |