Patent US4431264A successfully refreshed from Google Patents.
US4431264A
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Fluorosiloxane optical cladding
Assignee: Raychem Corp
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Filing: 1981-09-14
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Granted: 1984-02-14
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Expires: 2001-09-14
Abstract
Abstract A waveguide comprises an optical fiber core and a cross-linked polyfluorosiloxane cladding having a fluorine content of from 1 to 52% by weight. The use of polyfluorosiloxane cladding produces a waveguide having a high numerical aperture.
Inventors
- 👤 Raymond Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:30
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/08; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/105; G; G02; G02B; G02B1/00; G02B1/04; G02B1/045; G02B1/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A waveguide comprising a silica core and an optically clear polymeric cladding disposed on, around, and in contact with the exterior surface of the core, the cladding having a refractive index lower than the refractive index of the core and having an elastic modulus of less than about 10 7 N/m 2 , wherein the cladding has a sufficiently low refractive index that the waveguide has a numerical aperture of at least 0.45.
Claim 2
Dependent Claim
73 words
A waveguide comprising a silica core and an optically clear polymeric cladding disposed on, around, and in contact with the exterior surface of the core, the cladding having a refractive index lower than the refractive index of the core and having an elastic modulus of less than about 10 7 N/m 2 , wherein the cladding has a sufficiently low refractive index that the waveguide has a numerical aperture of at least 0.45.
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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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |