US4964694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber and apparatus for producing same
Assignee: Fujikura Ltd
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Filing: 1989-07-17
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Granted: 1990-10-23
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Expires: 2009-07-17
Abstract
Abstract There is disclosed an optical fiber coated with a carbon layer in which carbon coating layer is formed by thermally decomposing a hydrocarbon or halogenated hydrocarbon compound having 15 or less carbon atoms. There is also disclosed an apparatus for producing the optical fiber coated with at least one carbon layer.
Inventors
- 👤 Keiji Oohashi
- 👤 Hideo Suzuki
- 👤 Shinji Araki
- 👤 Tsuyoshi Shimomichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:35
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/22; C03C25/223; C03C25/104; C03C25/106; C03C25/1061; C03C25/1062; C23; C23C; C23C16/00; C23C16/22; C23C16/26; C23C16/44; C23C16/54; C23C16/545
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
60 words
An optical fiber coated with a carbon coating layer in which the carbon coating layer is formed by thermally decomposing a compound selected from the group consisting of an unsaturated halogenated hydrocarbon compound, an unsaturated non-halogenated hydrocarbon compound and a saturated halogenated hydrocarbon compound each having 15 or less carbon atoms at the temperature necessary to thermally decompose the compound.
Claim 2
Dependent Claim
60 words
An optical fiber coated with a carbon coating layer in which the carbon coating layer is formed by thermally decomposing a compound selected from the group consisting of an unsaturated halogenated hydrocarbon compound, an unsaturated non-halogenated hydrocarbon compound and a saturated halogenated hydrocarbon compound each having 15 or less carbon atoms at the temperature necessary to thermally decompose the compound.
Claim 3
Dependent Claim
21 words
An optical fiber as claimed in claim 1, wherein the temperature is in the range of from 400° to 1100° C.
Claim 4
Dependent Claim
69 words
An optical fiber comprising (1) an inner carbon coating layer formed over an uncoated surface of the optical fiber by thermally decomposing a compound selected from the group consisting of an aromatic and halogenated aromatic hydrocarbon compound, and (2) an outer carbon coating layer formed over the inner carbon coating layer by thermally decomposing a compound selected from the group consisting of an aliphatic and halogenated aliphatic hydrocarbon compound.
Claim 5
Dependent Claim
69 words
An optical fiber comprising (1) an inner carbon coating layer formed over an uncoated surface of the optical fiber by thermally decomposing a compound selected from the group consisting of an aromatic and halogenated aromatic hydrocarbon compound, and (2) an outer carbon coating layer formed over the inner carbon coating layer by thermally decomposing a compound selected from the group consisting of an aliphatic and halogenated aliphatic hydrocarbon compound.
Claim 6
Dependent Claim
18 words
An optical fiber as claimed in claim 3, wherein the hydrocarbon compounds have 15 or less carbon atoms.
Claim 7
Dependent Claim
27 words
An optical fiber as claimed in claim 3, wherein the temperature for thermally decomposing the hydrocarbon compounds is in the range of from 400° to 1100° C.
Claim 8
Dependent Claim
37 words
An optical fiber as claimed in claim 3, wherein the hydrocarbon compounds have 15 or less carbon atoms, and the temperature for thermally decomposing the hydrocarbon compounds is in the range of from 400° to 1100° C.
Claim 9
Dependent Claim
23 words
An optical fiber as claimed in claim 3, wherein the thickness of each carbon coating layer is less than 0.6 μm or more.
Claim 10
Dependent Claim
71 words
An optical fiber comprising (1) an inner carbon coating layer formed over an uncoated surface of the optical fiber by thermally decomposing a hydrocarbon compound where at least half of the hydrogen atoms are substituted by halogen atoms, and (2) an outer carbon coating layer formed over the inner carbon coating layer by thermally decomposing a hydrocarbon compound where less than half of the hydrogen atoms are substituted by halogen atoms.
Claim 11
Dependent Claim
71 words
An optical fiber comprising (1) an inner carbon coating layer formed over an uncoated surface of the optical fiber by thermally decomposing a hydrocarbon compound where at least half of the hydrogen atoms are substituted by halogen atoms, and (2) an outer carbon coating layer formed over the inner carbon coating layer by thermally decomposing a hydrocarbon compound where less than half of the hydrogen atoms are substituted by halogen atoms.
Claim 12
Dependent Claim
18 words
An optical fiber as claimed in claim 8, wherein the hydrocarbon compounds have 15 or less carbon atoms.
Claim 13
Dependent Claim
27 words
An optical fiber as claimed in claim 8, wherein the temperature for thermally decomposing the hydrocarbon compounds is in the range of from 400° to 1100° C.
Claim 14
Dependent Claim
37 words
An optical fiber as claimed in claim 8, wherein the hydrocarbon compounds have 15 or less carbon atoms, and the temperature for thermally decomposing the hydrocarbon compounds is in the range of from 400° to 1100° C.
Claim 15
Dependent Claim
38 words
An optical fiber as claimed in claim 8, wherein the thickness of each carbon coating layer is less than 0.6 μm, and the total thickness of the inner and outer carbon coating layers is 0.1 μm or more.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |