US4615583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image fibers
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1984-02-22
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Granted: 1986-10-07
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Expires: 2004-02-22
Abstract
Abstract An image fiber in which the contrast of the viewed image is improved. The image fiber of the invention is composed of a plurality of optical fiber cores with a cladding layer provided around the cores and filled into the spaces between the cores. A primary coating covers the cores and cladding layer. The primary coating contains a light-absorbing substance, for instance, carbon particles. Preferably, the primary coating is composed mainly of silicone resin.
Inventors
- 👤 Koichi Tsuno
- 👤 Kunio Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:15
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/26; F; F02; F02M; F02M31/00; F02M31/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
An image fiber comprising: a plurality of optical fiber cores; a cladding layer provided around said cores and filled into spaces between said cores; a primary coating covering said cores and said cladding layer, said primary coating containing a light-absorbing substance; and a quartz sleeve provided between said primary coating and said plurality of optical fiber cores.
Claim 2
Dependent Claim
57 words
An image fiber comprising: a plurality of optical fiber cores; a cladding layer provided around said cores and filled into spaces between said cores; a primary coating covering said cores and said cladding layer, said primary coating containing a light-absorbing substance; and a quartz sleeve provided between said primary coating and said plurality of optical fiber cores.
Claim 3
Dependent Claim
15 words
The image fiber as claimed in claim 1, wherein said light-absorbing substance is carbon particles.
Claim 4
Dependent Claim
36 words
The image fiber as claimed in claim 1, wherein said light-absorbing substance comprises a material selected from the group consisting of carbon particles, NiO, CO 2 O 3 , CuO, Cr 2 O 3 and MnO.
Claim 5
Dependent Claim
18 words
The image fiber as claimed in claim 1, wherein said primary coating consists primarily of a silicone resin.
References Cited (Backward Citations)
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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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |