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Patent US4690503A successfully refreshed from Google Patents.
US4690503A
Expired / Lapsed
US
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Glass optical fiber having a primary and a secondary coating
Assignee: Plasma Optical Fibre BV
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Filing: 1984-09-12
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Granted: 1987-09-01
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Expires: 2004-09-12
Abstract
Abstract Glass optical fiber having a primary coating constructed from two layers (having a total thickness 50-70 μm), in which the first layer on the fiber consists of UV cured acrylate resin having a modulus of elasticity at 25° C. less than or equal to 5 N/mm 2 . The second layer is also a UV cured acrylate resin, but has a modulus of elasticity at 25° C. of from 25 to 1500 N/mm 2 . The ratio of the thickness of the first layer to the thickness of the second layer is between 0.5 and 2.
Inventors
- 👤 Petrus J. Janssen
- 👤 Peter C. Janssens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:55
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/1065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A coated optical fiber comprising: a glass optical fiber; a primary coating on the fiber, said primary coating comprising a UV cured acrylate; and a secondary coating surrounding and in intimate contact with the primary coating, said secondary coating comprising a thermoplastic resin; characterized in that: the primary coating has a thickness of 50 to 70 microns; the primary coating consists of an inner primary layer and an outer primary layer of UV cured acrylate, said inner primary layer being in contact with the fiber; the ratio of the thickness of the inner primary layer to the thickness of the outer primary layer is from 0.5 to 2; the inner primary layer has a modulus of elasticity less than or equal to 5 Newtons per square millimeter at 25° C.; and the outer primary layer has a modulus of elasticity from 25 to 1500 Newtons per square millimeter at 25° C.
Claim 2
Dependent Claim
151 words
A coated optical fiber comprising: a glass optical fiber; a primary coating on the fiber, said primary coating comprising a UV cured acrylate; and a secondary coating surrounding and in intimate contact with the primary coating, said secondary coating comprising a thermoplastic resin; characterized in that: the primary coating has a thickness of 50 to 70 microns; the primary coating consists of an inner primary layer and an outer primary layer of UV cured acrylate, said inner primary layer being in contact with the fiber; the ratio of the thickness of the inner primary layer to the thickness of the outer primary layer is from 0.5 to 2; the inner primary layer has a modulus of elasticity less than or equal to 5 Newtons per square millimeter at 25° C.; and the outer primary layer has a modulus of elasticity from 25 to 1500 Newtons per square millimeter at 25° C.
Claim 3
Dependent Claim
37 words
A coated optical fiber as claimed in claim 1, characterized in that the inner primary layer has a thickness from 20 to 40 microns, and the outer primary layer has a thickness from 20 to 40 microns.
Claim 4
Dependent Claim
71 words
A coated optical fiber as claimed in claim 1, characterized in that: the inner primary layer has a thickness from 25 to 35 microns, and has a modulus of elasticity from 2 to 4 Newtons per square millimeter at 25° C.; and the outer primary layer has a thickness from 25 to 35 microns and has a modulus of elasticity from 250 to 500 Newtons per square millimeter at 25° C.
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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |