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US4302233A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for the manufacture of a high-tensile-strength light wave-guide

Assignee: Siemens AG
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Filing: 1980-08-19
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Granted: 1981-11-24
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Expires: 2000-08-19
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Abstract

Abstract The present invention relates to a method for the manufacture of a high-tensile-strength light waveguide with a plastic layer on the optical fiber, in which a hardenable polymer precursor stage is applied to the optical fiber. Uniform, thick layers are produced in a single operation in a process comprising applying an oligomeric and/or polymeric polyaddition or polycondensation product to the optical fiber from a solution and subsequently irradiating with actinic light and/or performing a thermal treatment. The polyaddition or polycondensation product is made from a carbocyclic or heterocyclic compound which carries two functional groups suitable for addition or condensation reactions, and a diamine, a diisocyanate, a bis-acid chloride or a dicarboxylic acid. The carbocyclic or heterocyclic compound has in a position adjacent to the functional groups partially ester, amide, urethane or urea groupings which may be of an unsaturated nature. The light waveguides made by the method according to the invention are suitable particularly for purposes of optical information transmission.

Inventors

  • 👤 Hellmut Ahne
  • 👤 Hubert Aulich
  • 👤 Friedrich Weidinger
  • 👤 Roland Rubner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 23:55
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 149 words
A method for the manufacture of a high tensile-strength light waveguide having a plastic layer thereon, comprising: (a) forming an optical fiber by a fiber drawing process; (b) immediately thereafter applying to said fiber, from a solution, a hardenable polymer precursor stage comprising an oligomeric and/or polymeric polyaddition or polycondensation product of (1) a carbocyclic or heterocyclic compound carrying two groups selected from carboxyl, carboxylic acid chloride, amino and hydroxyl groups suitable for addition or condensation reaction; and (2) a member selected from a diamine, a diisocyanate, a bis-acidchloride and a dicarboxylic acid, said carbocyclic or heterocyclic compound having groupings selected from ester, amide, urethane and urea groupings partially in adjacent position to said groups suitable for addition or condensation reactions; and (c) treating said fiber having said hardenable polymer precursor stage thereon by a method selected from irradiation with actinic light and thermal treatment to harden said polymer.
Claim 2
Independent Claim 149 words
A method for the manufacture of a high tensile-strength light waveguide having a plastic layer thereon, comprising: (a) forming an optical fiber by a fiber drawing process; (b) immediately thereafter applying to said fiber, from a solution, a hardenable polymer precursor stage comprising an oligomeric and/or polymeric polyaddition or polycondensation product of (1) a carbocyclic or heterocyclic compound carrying two groups selected from carboxyl, carboxylic acid chloride, amino and hydroxyl groups suitable for addition or condensation reaction; and (2) a member selected from a diamine, a diisocyanate, a bis-acidchloride and a dicarboxylic acid, said carbocyclic or heterocyclic compound having groupings selected from ester, amide, urethane and urea groupings partially in adjacent position to said groups suitable for addition or condensation reactions; and (c) treating said fiber having said hardenable polymer precursor stage thereon by a method selected from irradiation with actinic light and thermal treatment to harden said polymer.
Claim 3
Dependent Claim 20 words
The method according to claim 1 wherein monomeric and/or oligomeric mono- or poly-functional cross-linking accelerators are included in said solution.
Claim 4
Dependent Claim 15 words
The method according to claim 1 wherein said solvent is selected from dimethylacetamide and N-methylpyrrolidone.
Claim 5
Dependent Claim 16 words
The method according to claim 1 wherein a lubricating layer is applied to the plastic layer.
Claim 6
Dependent Claim 16 words
The method according to claim 1 wherein said ester, amide, urethane and urea groupings are unsaturated.

References Cited (Backward Citations)

US3816160A Cited
US3957512A Cited
US4088489A Cited
USRE30186E Cited
US4115087A Cited
US4116654A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-11-23 1985-05-25 1985-11-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-11-23 1989-05-25 1989-11-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-11-23 1993-05-25 1993-11-24 $7700.00 Window Closed / Lapsed

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