US4198121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating for optical fibres
Assignee: Cables de Lyon SA
•
Filing: 1975-06-24
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Granted: 1980-04-15
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Expires: 1995-06-24
Abstract
Abstract Coating for optical fibres comprising at least one layer of a resinous composition which hardens in the cold and in a few seconds upon contact with a gaseous catalyst applicable more particularly to optical fibres intended to be assembled together in a cable.
Inventors
- 👤 Louis Le Davay
- 👤 Robert Jocteur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:59
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/542; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C08G18/08; C08G18/16; C08G18/18; C08G18/1891; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A coating optical fibre comprising an optical fibre coated with at least one layer of a hardened resinous composition comprising the reaction product of a phenolic resin and an isocyanate hardened at ambient temperature and in a few seconds on contact with a catalytic amount of a tertiary amine which is gaseous or is suspended in a gas.
Claim 2
Dependent Claim
58 words
A coating optical fibre comprising an optical fibre coated with at least one layer of a hardened resinous composition comprising the reaction product of a phenolic resin and an isocyanate hardened at ambient temperature and in a few seconds on contact with a catalytic amount of a tertiary amine which is gaseous or is suspended in a gas.
Claim 3
Dependent Claim
18 words
The coated optical fibre according to claim 1, wherein said resinous composition consists essentially of said reaction product.
Claim 4
Dependent Claim
124 words
A process for producing the coated optical fibre according to claim 1, comprising coating an optical fibre with a layer of a resinous composition by passing the optical fibre through an organic solvent solution of the resinous composition, said resinous composition comprising a phenolic resin and an isocyanate and being hardenable at ambient temperature and in a few seconds on contact with a catalytic amount of a gaseous catalyst comprising a tertiary amine which is gaseous or suspended in a gas, and then hardening the resinous composition layer on the optical fibre by passing the optical fibre coated with the layer of the resinous composition through a reaction zone into contact with the gaseous catalyst, the optical fibre remaining substantially rectilinear during the process.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |