US4655545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber for optical transmission
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1984-01-06
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Granted: 1987-04-07
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Expires: 2004-01-06
Abstract
Abstract A glass fiber for optical transmission comprising a glass fiber having provided thereon a first coating layer of a hardened resin and a second fluorine-containing resin layer formed by extrusion molding is disclosed. At least one of the first and second layers contains an adsorbable solid powder which is capable of adsorbing fluorine gas and/or hydrofluoric acid generated from the fluorine-containing resin during the extrusion molding. The glass fiber has an improved mechanical strength without adversely affecting transmission properties of the glass fiber.
Inventors
- 👤 Toru Yamanishi
- 👤 Yuji Kameo
- 👤 Masaaki Yoshida
- 👤 Masao Yuto
- 👤 Chihaya Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:07
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/1065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A glass fiber for optical transmission comprising a glass fiber having provided thereon a first coating layer of a hardened resin and a second fluorine-containing resin layer formed by extrusion molding, wherein said fluorine-containing resin is selected from the group consisting of tetrafluoroethylene polymers, tetrafluoroethylene-hexafluoropropylene copolymers, ethylene-tetrafluoroethylene copolymers, perfluoroalkoxyethylene-tetrafluoroethylene copolymers, chlorotrifluoroethylene polymers and vinylidene fluoride polymers, and said second layer contains an adsorbable solid powder.
Claim 2
Dependent Claim
65 words
A glass fiber for optical transmission comprising a glass fiber having provided thereon a first coating layer of a hardened resin and a second fluorine-containing resin layer formed by extrusion molding, wherein said fluorine-containing resin is selected from the group consisting of tetrafluoroethylene polymers, tetrafluoroethylene-hexafluoropropylene copolymers, ethylene-tetrafluoroethylene copolymers, perfluoroalkoxyethylene-tetrafluoroethylene copolymers, chlorotrifluoroethylene polymers and vinylidene fluoride polymers, and said second layer contains an adsorbable solid powder.
Claim 3
Dependent Claim
35 words
A glass fiber for optical transmission according to claim 1, wherein said adsorbable solid powder is present in an amount of from 0.05 to 20% by weight based on the weight of the second layer.
Claim 4
Dependent Claim
25 words
A glass fiber for optical transmission as claimed in claim 1, wherein the adsorbable solid powder has a decomposition point of 350° C. or more.
Claim 5
Dependent Claim
54 words
A glass fiber for optical transmission as claimed in claim 2, wherein the adsorbable solid powder is selected from the group consisting of zinc oxide, aluminium oxide, titanium oxide, magnesium oxide, calcium oxide, silicon oxide, iron oxide, boron oxide, barium sulfate, zirconium oxide, calcium carbonate, carbon powder, activated carbon powder and a mixture thereof.
Claim 6
Dependent Claim
40 words
A glass fiber for optical transmission as claimed in claim 1, wherein said first layer is a single layer of the material selected from the group consisting of silicone resins, epoxy resins, urethane resins, polyester, polybutadiene and modified resins thereof.
Claim 7
Dependent Claim
46 words
A glass fiber for optical transmission as claimed in claim 4, wherein said adsorbable solid powder is selected from the group consisting of SiO 2 , TiO 2 , CaCO 3 , B 2 O 3 , ZrO 2 , BaSO 4 and a mixture thereof.
Claim 8
Dependent Claim
23 words
A glass fiber for optical transmission as claimed in claim 1, wherein said fluorine-containing resin is an ethylene-tetrafluoroethylene copolymer or a perfluoroalkoxyethylene-tetrafluoroethylene copolymer.
Claim 9
Dependent Claim
42 words
A glass fiber for optical transmission as claimed in claim 5, wherein said first layer is composed of a material selected from the group consisting of a silicone resin, an epoxy acrylate resin, a urethane acrylate resin and a butadiene acrylate resin.
Claim 10
Dependent Claim
39 words
A glass fiber for optical transmission as claimed in claim 1, wherein said first layer comprises multiple layers of the material selected from the group consisting of silicone resins, epoxy resins, urethane resins, polyester, polybutadiene and modified resins thereof.
References Cited (Backward Citations)
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GB1524316A
Cited
US4344669A
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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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |