US4737012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared light transmission fiber
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1987-02-05
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Granted: 1988-04-12
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Expires: 2007-02-05
Abstract
Abstract An infrared light transmission fiber comprising an optical fiber made of an infrared light transmitting material which is covered with a reinforcing layer formed by impregnating glass fibers with a thermosetting varnish and curing the same is disclosed. The optical fiber may have a primary coating of cured thermosetting resin provided on the optical fiber and/or a coating of an elastic material provided on the reinforcing layer.
Inventors
- 👤 Kazuhito Murakami
- 👤 Kenichi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:22
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/102; G02B6/44; G02B6/4401; G02B6/4429; G02B6/443; G02B6/4432
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
171 words
An infrared light transmission fiber comprising: a single optical fiber made of an infrared light transmitting material, said material being selected from (1) silver halide or a mixture of silver halides, (2) thallium halide or a mixture of thallium halides, (3) alkali metal halides or alkaline earth metal halides, or mixtures thereof, (4) a chalcogenide, (5) a mixture of (a) silver halides and mixtures thereof, (b) thallium halides and mixtures thereof, and (c) alkali metal halides or alkaline earth metal halides, or mixtures thereof, a primary coating of a cured thermosetting resin which covers the outer surface of said single optical fiber, said primary resin consisting essentially of a resin selected from the group consisting of polyester imide, polyimide, polyamide-amide, polyester, polyurethane or polyvinyl formal, and a reinforcing layer covering only said primary coating of said single optical fiber and consisting essentially of glass fibers impregnated with a thermosetting resin which is cured after impregnation, said resin of the reinforcing layer being the same as the resin for the primary coating.
Claim 2
Dependent Claim
171 words
An infrared light transmission fiber comprising: a single optical fiber made of an infrared light transmitting material, said material being selected from (1) silver halide or a mixture of silver halides, (2) thallium halide or a mixture of thallium halides, (3) alkali metal halides or alkaline earth metal halides, or mixtures thereof, (4) a chalcogenide, (5) a mixture of (a) silver halides and mixtures thereof, (b) thallium halides and mixtures thereof, and (c) alkali metal halides or alkaline earth metal halides, or mixtures thereof, a primary coating of a cured thermosetting resin which covers the outer surface of said single optical fiber, said primary resin consisting essentially of a resin selected from the group consisting of polyester imide, polyimide, polyamide-amide, polyester, polyurethane or polyvinyl formal, and a reinforcing layer covering only said primary coating of said single optical fiber and consisting essentially of glass fibers impregnated with a thermosetting resin which is cured after impregnation, said resin of the reinforcing layer being the same as the resin for the primary coating.
Claim 3
Dependent Claim
22 words
The infrared light transmission fiber according to claim 1, wherein a coating of an elastic material is provided on said reinforcing layer.
Claim 4
Dependent Claim
18 words
The infrared light transmission fiber according to claim 1, wherein the infred light transmitting material is non-clad AgCl.
Claim 5
Dependent Claim
21 words
The infrared light transmission fiber according to claim 1, wherein the diameter of the infrared light transmitting material is 0.7 mm.
Claim 6
Dependent Claim
17 words
The infrared light transmission fiber according to claim 1, wherein the infrared light transmitting material is AgCl.
References Cited (Backward Citations)
FR2296192A1
Cited
DE2556861A1
Cited
US4072400A
Cited
US4113349A
Cited
US4213672A
Cited
GB1568178A
Cited
US4189208A
Cited
US4315667A
Cited
US4253731A
Cited
US4342500A
Cited
US4304462A
Cited
US4432607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |