US4167305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical transmission fiber
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1978-02-15
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Granted: 1979-09-11
•
Expires: 1998-02-15
Abstract
Abstract An optical transmission fiber having improved mechanical strength and suitable for use in optical communication comprising an optical fiber having formed thereover at least one layer of a composition mainly comprising a thermoplastic resin having a functional group, and a method for making the optical transmission fiber.
Inventors
- 👤 Terumichi Ichiba
- 👤 Munetaka Kawaguchi
- 👤 Yutaka Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:30
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/036; G02B6/03616; G02B6/03638; C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C03C25/1065; G02B6/02395; G02B6/03622; G02B6/03627; G02B6/44; G02B6/4401; G02B6/4429; G02B6/4434; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
92 words
An optical transmission fiber comprising (1) an optical fiber which comprises a core layer having a clad layer thereover, said clad layer having a lower refractive index than said core layer, and (2) over said optical fiber at least one layer of a composition mainly comprising a thermoplastic resin selected from the group consisting of a polyamide resin, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin, wherein said thermoplastic resin has a refractive index at least equal to the refractive index of the clad of said optical fiber.
Claim 2
Dependent Claim
92 words
An optical transmission fiber comprising (1) an optical fiber which comprises a core layer having a clad layer thereover, said clad layer having a lower refractive index than said core layer, and (2) over said optical fiber at least one layer of a composition mainly comprising a thermoplastic resin selected from the group consisting of a polyamide resin, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin, wherein said thermoplastic resin has a refractive index at least equal to the refractive index of the clad of said optical fiber.
Claim 3
Dependent Claim
17 words
The optical transmission fiber as claimed in claim 1, wherein said thermoplastic resin is a polyamide resin.
Claim 4
Dependent Claim
32 words
The optical transmission fiber as claimed in claim 1, wherein said thermoplastic resin is selected from the group consisting of an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin.
Claim 5
Dependent Claim
18 words
The optical transmission fiber as claimed in claim 1, wherein said resin composition absorbs light of all wavelengths.
Claim 6
Dependent Claim
21 words
The optical transmission fiber as claimed in claim 1, wherein said resin composition absorbs only the light used for optical communication.
Claim 7
Dependent Claim
95 words
An optical transmission fiber comprising (1) an optical fiber of the self-focussing type wherein the refractive index varies continuously from a maximum at the center to a minimum at the periphery of said fiber and (2) over said optical fiber at least one layer of a composition mainly comprising a thermoplastic resin selected from the group consisting of a polyamide resin, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin, wherein said thermoplastic resin has a refractive index at least equal to the refractive index of the periphery of said optical fiber.
Claim 8
Dependent Claim
95 words
An optical transmission fiber comprising (1) an optical fiber of the self-focussing type wherein the refractive index varies continuously from a maximum at the center to a minimum at the periphery of said fiber and (2) over said optical fiber at least one layer of a composition mainly comprising a thermoplastic resin selected from the group consisting of a polyamide resin, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin, wherein said thermoplastic resin has a refractive index at least equal to the refractive index of the periphery of said optical fiber.
Claim 9
Dependent Claim
17 words
The optical transmission fiber as claimed in claim 6, wherein said thermoplastic resin is a polyamide resin.
Claim 10
Dependent Claim
31 words
The optical transmission fiber as claimed in claim 6, wherein said thermoplastic resin is selected from the group consisting of an ethylene-vinyl-acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin.
Claim 11
Dependent Claim
18 words
The optical transmission fiber as claimed in claim 6, wherein said thermoplastic resin absorbs light of all wavelengths.
Claim 12
Dependent Claim
20 words
The optical transmission fiber as claimed in claim 6, wherein said thermoplastic resin absorbs only light used for optical communications.
Claim 13
Dependent Claim
96 words
An optical transmission fiber comprising (1) an optical fiber of the single material bar and pipe type wherein the refractive index of the air space between the bar and pipe is less than that of the bar and pipe and (2) over said optical fiber at least one layer of a composition mainly comprising a thermoplastic resin selected from the group consisting of a polyamide resin, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin, wherein said thermoplastic resin has a refractive index at least equal to the refractive index of said pipe.
Claim 14
Dependent Claim
96 words
An optical transmission fiber comprising (1) an optical fiber of the single material bar and pipe type wherein the refractive index of the air space between the bar and pipe is less than that of the bar and pipe and (2) over said optical fiber at least one layer of a composition mainly comprising a thermoplastic resin selected from the group consisting of a polyamide resin, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin, wherein said thermoplastic resin has a refractive index at least equal to the refractive index of said pipe.
Claim 15
Dependent Claim
17 words
The optical transmission fiber as claimed in claim 11, wherein said thermoplastic resin is a polyamide resin.
Claim 16
Dependent Claim
32 words
The optical transmission fiber as claimed in claim 11, wherein said thermoplastic resin is selected from the group consisting of an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer and an ionomer resin.
Claim 17
Dependent Claim
18 words
The optical transmission fiber as claimed in claim 11, wherein said thermoplastic resin absorbs light of all wavelengths.
Claim 18
Dependent Claim
20 words
The optical transmission fiber as claimed in claim 11, wherein said thermoplastic resin absorbs only light used for optical communications.
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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) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |