Patent US4979799A successfully refreshed from Google Patents.
US4979799A
Expired / Lapsed
US
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Optical waveguide with polymer core and polymer cladding
Assignee: Hoechst AG
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Filing: 1989-04-26
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Granted: 1990-12-25
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Expires: 2009-04-26
Abstract
Abstract An optical waveguide having a core/sheath structure whose sheath comprises a terpolymer based on vinylidene fluoride, tetrafluoroethylene and hexafluorpropylene, is suitable for transmission paths of ca. 10 to 100 m and can also be used at a temperature of above 100° C. without significant reduction of the transmission path.
Inventors
- 👤 Peter Herbrechtsmeier
- 👤 Gerhard Wieners
- 👤 Jurgen Kuhls
- 👤 Manfred Tschacher
- 👤 Herbert Fitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:19
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/02; G02B6/02033; G02B1/00; G02B1/04; G02B1/045; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
An optical waveguide having a two component structure core and sheath whose core comprises a polymer with a refractive index n(C) and whose sheath comprises a polymer with a refractive index n(S), where n(C)/n(S)>1.01, wherein the core comprises a polycarbonate or a polymer which contains units which are derived from one selected from the group consisting of styrene, from a substituted styrene, from an acrylate, from a methacrylate or from a fluoroacrylate, and the sheath comprises a polymer which contains units which, based on the polymer in each case, are derived from 30 to 50% by weight of vinylidene fluoride, from 25 to 55% by weight of tetrafluoroethylene and from 15 to 25% by weight of hexafluoropropylene wherein said polymer which contains units of vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene in the sheath of the optical waveguide is crosslinked.
Claim 2
Dependent Claim
135 words
An optical waveguide having a two component structure core and sheath whose core comprises a polymer with a refractive index n(C) and whose sheath comprises a polymer with a refractive index n(S), where n(C)/n(S)>1.01, wherein the core comprises a polycarbonate or a polymer which contains units which are derived from one selected from the group consisting of styrene, from a substituted styrene, from an acrylate, from a methacrylate or from a fluoroacrylate, and the sheath comprises a polymer which contains units which, based on the polymer in each case, are derived from 30 to 50% by weight of vinylidene fluoride, from 25 to 55% by weight of tetrafluoroethylene and from 15 to 25% by weight of hexafluoropropylene wherein said polymer which contains units of vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene in the sheath of the optical waveguide is crosslinked.
Claim 3
Dependent Claim
53 words
An optical waveguide as claimed in claim 1, wherein the sheath comprises a polymer, which contains units which, based in each case on the polymer, are derived from 35 to 45% by weight of vinylidene fluoride, from 35 to 45% by weight of tetrafluoroethylene and from 17 to 22% by weight of hexafluoropropylene.
Claim 4
Dependent Claim
32 words
An optical waveguide as claimed in claim 1, wherein the core comprises a polymer which contains units which are derived from one selected from the group consisting of α-fluoroacrylates, acrylates or methacrylates.
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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) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |