Patent US4453962A successfully refreshed from Google Patents.
US4453962A
Expired / Lapsed
US
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Method of manufacturing a flexible optical fiber bundle
Assignee: Fujinon Corp
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Filing: 1982-06-08
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Granted: 1984-06-12
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Expires: 2002-06-08
Abstract
Abstract A number of three-layer optical fibers each having a core a cladding and an overcoating layer of acid-soluble glass material are bonded together by means of an adhesive which can be removed by applying heat. The bonded optical fibers are heated and stretched to obtain a solid optical fiber bundle. The solid optical fiber bundle is brought into contact with an acid to elute (leach away) the overcoating layer of the acid-soluble glass material.
Inventors
- 👤 Yuho Harada
- 👤 Tsutomu Maruyama
- 👤 Yoshiyuki Kumakura
- 👤 Shigeo Kuwayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:58
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/022; C03B37/023; C03B37/025; C03B37/028; C03B2203/00; C03B2203/02; C03B2203/04; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
A method of manufacturing a flexible optical fiber bundle comprising the steps of: (a) forming a number of three-layer optical fibers each including an innermost layer of core glass having a high refractive index, an intermediate layer of cladding glass having a low refractive index and a high resistance to acids, and an outermost layer of acid-soluble glass; (b) bonding together the number of three-layer optical fibers by means of adhesive which can be removed by applying heat; (c) treating the bonded optical fibers with heat or heat and pressure to fuse them together throughout their length and remove said adhesive; (d) heating said stretching the fused optical fibers to obtain a stretched optical fiber bundle; and (e) processing the stretched optical fiber bundle with an acid to leach away the layer of acid-soluble glass.
Claim 2
Independent Claim
135 words
A method of manufacturing a flexible optical fiber bundle comprising the steps of: (a) forming a number of three-layer optical fibers each including an innermost layer of core glass having a high refractive index, an intermediate layer of cladding glass having a low refractive index and a high resistance to acids, and an outermost layer of acid-soluble glass; (b) bonding together the number of three-layer optical fibers by means of adhesive which can be removed by applying heat; (c) treating the bonded optical fibers with heat or heat and pressure to fuse them together throughout their length and remove said adhesive; (d) heating said stretching the fused optical fibers to obtain a stretched optical fiber bundle; and (e) processing the stretched optical fiber bundle with an acid to leach away the layer of acid-soluble glass.
Claim 3
Dependent Claim
26 words
A method as defined in claim 1 in which a layer of acid-soluble glass is provided to cover the bonded optical fibers prior to the fusing.
References Cited (Backward Citations)
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US3830667A
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US3981706A
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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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |