US4133915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing coated optical elements
Assignee: Siemens AG
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Filing: 1977-07-27
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Granted: 1979-01-09
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Expires: 1997-07-27
Abstract
Abstract Optical fibers or bundles of fibers are uniformly coated with a high-boiling, viscous or thixotropic, optically clear liquid, such as polydimethylsiloxane, polymethylphenylsiloxane and then coated with a curable resin, such as urethane.
Inventors
- 👤 Bjoern Noethe
- 👤 Helmut Saller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:31
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/1065; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/4486
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A method of producing optical fibers or fiber bundles coated with a protective layer, comprising: substantially uniformly coating glass fibers or fiber bundles with a high-boiling, highly viscous, optically clear liquid, said liquid being characterized by: a boiling point above 180° C. at 0.1 Newtons per square millimeter; a viscosity in the range from 1 to 200 Newtons-seconds at a temperature of 20° C., and a transparency so that a 1 centimeter thick layer of such liquid has a transparency of more than 70% at a light wavelength ranging from 0.4 to 1.5 micrometers, and encapsulating the so-coated fibers or fiber bundles with a curable resin material and curing such resin to form an outer coating about the so-coated fibers or fiber bundles.
Claim 2
Independent Claim
123 words
A method of producing optical fibers or fiber bundles coated with a protective layer, comprising: substantially uniformly coating glass fibers or fiber bundles with a high-boiling, highly viscous, optically clear liquid, said liquid being characterized by: a boiling point above 180° C. at 0.1 Newtons per square millimeter; a viscosity in the range from 1 to 200 Newtons-seconds at a temperature of 20° C., and a transparency so that a 1 centimeter thick layer of such liquid has a transparency of more than 70% at a light wavelength ranging from 0.4 to 1.5 micrometers, and encapsulating the so-coated fibers or fiber bundles with a curable resin material and curing such resin to form an outer coating about the so-coated fibers or fiber bundles.
Claim 3
Dependent Claim
30 words
A method as defined in claim 1 wherein the optically clear liquid is a material selected from the group consisting of polydimethylsiloxane, polymethylphenylsiloxane, hydrocarbon or ester oils and mixtures thereof.
Claim 4
Dependent Claim
23 words
A method as defined in claim 1 wherein the curable resin is dyed in bulk before encapsulating the coated fibers or fiber bundles.
Claim 5
Dependent Claim
24 words
A method as defined in claim 1 wherein the curable resin is marked by printing after curing on the coated fibers or fiber bundles.
Claim 6
Dependent Claim
15 words
A method as defined in claim 1 wherein the cured resin is soft after curing.
Claim 7
Dependent Claim
17 words
A method as defined in claim 1 wherein the resin material is a foamed structure after curing.
References Cited (Backward Citations)
US3937559A
Cited
DE2528991A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |