US4848869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating and optical fiber comprising polyimide-silicone block copolymer coating
Assignee: Corning Inc
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Filing: 1988-08-08
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Granted: 1989-07-18
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Expires: 2008-08-08
Abstract
Abstract A silicone-based composite coating system for a glass optical fiber, the system comprising a silicone polymer undercoating component and a silicone-polyimide block copolymer overcoating component, is provided. The coating system can be applied entirely on-line, improves the handling characteristics of the fibers over conventional silicone-coated fibers, offers an excellent combination of optical and elastic properties, and does not compromise the high-temperature operating characteristics of silicone-based coating systems.
Inventors
- 👤 Eric H. Urruti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:41
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/443; C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/1065
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
37 words
A glass optical fiber having at least two protective polymer coatings disposed on the outer surface thereof wherein the polymer coatings comprise a silicone-polyimide block copolymer layer bonded to the exterior surface of a silicone polymer layer.
Claim 2
Dependent Claim
37 words
A glass optical fiber having at least two protective polymer coatings disposed on the outer surface thereof wherein the polymer coatings comprise a silicone-polyimide block copolymer layer bonded to the exterior surface of a silicone polymer layer.
Claim 3
Dependent Claim
34 words
A glass optical fiber in accordance with claim 1 which comprises a glass core and a glass cladding, and wherein the silicone polymer layer is disposed on the exterior surface of the glass cladding.
Claim 4
Dependent Claim
39 words
A glass optical fiber in accordance with claim 2 wherein the glass cladding comprises an outer glass layer and an inner glass region, and wherein the outer glass layer has a higher refractive index than the inner glass region.
Claim 5
Dependent Claim
52 words
In a silicone-coated optical waveguide comprising a glass optical fiber and one or more polymer coatings on the optical fiber, at least one of the polymer coatings consisting essentially of a silicone coating, the improvement wherein the silicone coating is provided with a polymer overcoating consisting essentially of a silicone-polyimide block copolymer.
Claim 6
Dependent Claim
52 words
In a silicone-coated optical waveguide comprising a glass optical fiber and one or more polymer coatings on the optical fiber, at least one of the polymer coatings consisting essentially of a silicone coating, the improvement wherein the silicone coating is provided with a polymer overcoating consisting essentially of a silicone-polyimide block copolymer.
Claim 7
Dependent Claim
36 words
A silicone-coated optical fiber in accordance with claim 4 wherein the glass optical fiber comprises a glass core and a glass cladding, and wherein the silicone coating is disposed on and in contact with glass cladding.
Claim 8
Independent Claim
40 words
A method for treating an optical fiber having an exterior silicone coating to improve the handling characteristics thereof which comprises the step of applying to the exterior silicone coating a polymer overcoating consisting essentially of a silicone-polyimide block copolymer coating.
Claim 9
Independent Claim
40 words
A method for treating an optical fiber having an exterior silicone coating to improve the handling characteristics thereof which comprises the step of applying to the exterior silicone coating a polymer overcoating consisting essentially of a silicone-polyimide block copolymer coating.
Claim 10
Dependent Claim
36 words
A method in accordance with claim 6 wherein the silicone-polyimide block copolymer overcoating is applied to the exterior silicone coating before the silicone coating contacts any solid or liquid material other than the silicone-polyimide block copolymer.
Claim 11
Dependent Claim
26 words
A method in accordance with claim 7 wherein the silicone-polyimide block copolymer overcoating is applied as a solution of a silicone-polyimide resin in a volatile solvent.
Claim 12
Dependent Claim
17 words
A method in accordance with claim 7 wherein the silicone-polyimide block copolymer is applied by melt extrusion.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |