US4585306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical materials
Assignee: Daikin Industries Ltd
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Filing: 1984-10-31
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Granted: 1986-04-29
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Expires: 2004-10-31
Abstract
Abstract An optical material comprising a copolymer of: (1) ethylene, (2) at least one of tetrafluoroethylene and chlorotrifluoroethylene and (3) olefin having at least one fluoroalkyl group, and a cladding material as used in assembling an optical fiber which comprises the copolymer as defined in above.
Inventors
- 👤 Akira Ohmori
- 👤 Nobuyuki Tomihashi
- 👤 Kiyohiko Ihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; C; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C03C25/00; C03C25/10; C03C25/104; C03C25/105; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; G02B1/00; G02B1/04; G02B1/041; G02B1/043; G02B1/045; G02B1/048; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; C08L23/26; C08L23/28
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
124 words
In an optical fiber comprising a cladding and a core, the improvment wherein said cladding comprises a copolymer consisting essentially of (1) 30 to 60 mol % of ethylene, (2) 20 to 70 mol % of at least one member selected from the group consisting of tetrafluoroethylene and chlorotrifluoroethylene, and (3) 1 to 30 mol % of olefin having at least one fluoroalkyl group represented by the formula X.sup.1 (CF.sub.2).sub.n (CH.sub.2).sub.m (O).sub.p CX.sup.2 ═CX.sup.3 X.sup.4 wherein X 1 represents hydrogen, fluorine or ##STR2## X 2 represents hydrogen, fluorine or trifluoromethyl; X 3 and X 4 are the same or different and represent hydrogen or fluorine; n is an integer of 1 to 6; m is 0 or 1; and p is 0 or 1.
Claim 2
Dependent Claim
124 words
In an optical fiber comprising a cladding and a core, the improvment wherein said cladding comprises a copolymer consisting essentially of (1) 30 to 60 mol % of ethylene, (2) 20 to 70 mol % of at least one member selected from the group consisting of tetrafluoroethylene and chlorotrifluoroethylene, and (3) 1 to 30 mol % of olefin having at least one fluoroalkyl group represented by the formula X.sup.1 (CF.sub.2).sub.n (CH.sub.2).sub.m (O).sub.p CX.sup.2 ═CX.sup.3 X.sup.4 wherein X 1 represents hydrogen, fluorine or ##STR2## X 2 represents hydrogen, fluorine or trifluoromethyl; X 3 and X 4 are the same or different and represent hydrogen or fluorine; n is an integer of 1 to 6; m is 0 or 1; and p is 0 or 1.
Claim 3
Dependent Claim
31 words
In an optical fiber as defined in claim 1 wherein said olefin is selected from the group consisting of hexafluoropropene, 3,3,3-trifluoropropene, 3,3,3-trifluoro-2-trifluoromethylpropene, perfluoromethylvinyl ether, 3,3,3-trifluoro-2-fluoropropene, 1,1,2,2,3,3,4,4-octafluorobutylvinyl ether, perfluoropentene-1 and perfluoroethylvinyl ether.
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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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |