US4099837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating of fiber lightguides with UV cured polymerization products
Assignee: AT&T Inc
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Filing: 1976-05-26
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Granted: 1978-07-11
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Expires: 1996-05-26
Abstract
Abstract Glass fiber lightguides require polymer coatings for protection. A new coating system comprising an acrylate-epoxy polymer that is UV cured is convenient to apply and gives excellent strength and durability to fiber lightguides.
Inventors
- 👤 Hargovind Nihchaldas Vazirani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:29
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; B; B05; B05D; B05D7/00; B05D7/20; G; G02; G02B; G02B6/00; G02B6/02; G02B6/02395; B05D1/00; B05D1/18; B05D3/00; B05D3/06; B05D3/061; B05D3/065; B05D3/067
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
An optical fiber waveguide comprising a glass fiber and a polymer coating the fiber, the invention characterized in that the polymer coating comprises the polymerization product of a prepolymer mixture resulting from reacting acrylic acid with a 0.4 to 1.0 weight ratio mixture of aliphatic diglycidyl ether to aromatic diglycidyl ether, and further characterized in that the polymerization product contains a UV sensitizer in order to cure said prepolymer mixture product with ultra violet light.
Claim 2
Dependent Claim
75 words
An optical fiber waveguide comprising a glass fiber and a polymer coating the fiber, the invention characterized in that the polymer coating comprises the polymerization product of a prepolymer mixture resulting from reacting acrylic acid with a 0.4 to 1.0 weight ratio mixture of aliphatic diglycidyl ether to aromatic diglycidyl ether, and further characterized in that the polymerization product contains a UV sensitizer in order to cure said prepolymer mixture product with ultra violet light.
Claim 3
Dependent Claim
14 words
The waveguide of claim 1 in which the aliphatic ether is 1,4-butanediol diglycidyl ether.
Claim 4
Dependent Claim
17 words
The waveguide of claim 2 in which the aromatic ether is diglycidyl ether of halogenated bisphenol A.
Claim 5
Dependent Claim
18 words
The waveguide of claim 1 in which the polymerization product additionally contains a silane or titanate coupling agent.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |