Patent US3865971A successfully refreshed from Google Patents.
US3865971A
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Submarine coaxial cables
Assignee: NTT Inc
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Filing: 1973-08-07
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Granted: 1975-02-11
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Expires: 1993-08-07
Abstract
Abstract There is provided a submarine coaxial cable in which both of the inner and outer conductors or at least the inner conductor, is made of a conductive material having a lower temperaturecoefficient of resistivity than that of annealed pure copper. The change of attenuation with respect to the temperature of the submarine coaxial cable may be considerably decreased.
Inventors
- 👤 Denroku Kumagai
- 👤 Gen Marubayashi
- 👤 Kishio Arita
- 👤 Shugo Kubo
- 👤 Goro Yamauchi
- 👤 Toshio Takahashi
- 👤 Toshihiko Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:14
CPC Classifications
H; H01; H01B; H01B1/00; H01B11/00; H01B11/02; H01B11/06; H01B11/10; H01B11/18; H01B11/1808; H01B7/00; H01B7/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
105 words
A SUBMARINE COAXIAL CABLE CHARACTERIZED BY COMPRISING A. AN INNER CONDUCTOR, B. AN OUTER CONDUCTOR DISPOSED COAXIALLY OF SAID INNER CONDUCTOR AND IN SPACED APART RELATION THEREWITH TO SURROUND THE SAME, C. AN INSULATING MATERIAL FILLING THE SPACE BETWEEN SAID INNER AND OUTER CONDUCTOR, AND D. SAID INNER CONDUCTOR BEING MADE OF A DISPERSION TYPE CONDUCTIVE MATERIAL HAVING A TEMPERATURE COEFFICIENT OF RESISTIVITY LOWER THAN THAT OF PURE COPPER AND CONSISTING OF COPPER AND 0.01-5.00 PERCENT BY WEIGHT OF FINELY DIVIDED POWDER DISPERSED IN SAID COPPER, SAID FINELY DIVIDED POWDER BEING FROM THE GROUP CONSISTING OF MATERIAL OXIDES, FERRITE, THERMISTOR, CARBIDES, AND NICKEL-COPPER ALLOY POWDER.
Claim 2
Dependent Claim
105 words
A SUBMARINE COAXIAL CABLE CHARACTERIZED BY COMPRISING A. AN INNER CONDUCTOR, B. AN OUTER CONDUCTOR DISPOSED COAXIALLY OF SAID INNER CONDUCTOR AND IN SPACED APART RELATION THEREWITH TO SURROUND THE SAME, C. AN INSULATING MATERIAL FILLING THE SPACE BETWEEN SAID INNER AND OUTER CONDUCTOR, AND D. SAID INNER CONDUCTOR BEING MADE OF A DISPERSION TYPE CONDUCTIVE MATERIAL HAVING A TEMPERATURE COEFFICIENT OF RESISTIVITY LOWER THAN THAT OF PURE COPPER AND CONSISTING OF COPPER AND 0.01-5.00 PERCENT BY WEIGHT OF FINELY DIVIDED POWDER DISPERSED IN SAID COPPER, SAID FINELY DIVIDED POWDER BEING FROM THE GROUP CONSISTING OF MATERIAL OXIDES, FERRITE, THERMISTOR, CARBIDES, AND NICKEL-COPPER ALLOY POWDER.
Claim 3
Dependent Claim
47 words
A submarine coaxial cable as defined in claim 1 wherein said dispersion-type conductive material consists of copper having 0.01 - 5.00 percent by weight of finely divided ferrite powder dispersed therein, said ferrite powder being selected from the group consisting of MnCoFe2O4, BaFe12O19, NiZnFe2O4, NiCuFe2O4 and Li0.5Fe2.5O4.
Claim 4
Dependent Claim
74 words
A submarine coaxial cable as defined in claim 1 wherein said dispersion-type conductive material consists of pure copper having dispersed therein 0.01-5.00 percent by weight of finely divided thermistor powder, said thermistor powder consisting of, as a major component, oxides of transient elements selected from the group consisting of oxides of Mn, Ni, Co and Cu and, as a minor component, oxides selected from the group consisting of Mo, Fe, Zr, Cr and V.
Claim 5
Dependent Claim
44 words
A submarine coaxial cable as defined in claim 1 wherein said dispersion-type conductive material consists of pure copper having dispersed 0.01 - 5.00 percent by weight of at least one compound selected from the oxide group consisting of MgO, MnO2, CrO2, V2O3 and Al2O3.
Claim 6
Dependent Claim
46 words
A submarine coaxial cable as defined in claim 1 wherein said dispersion-type conductive material consists of pure copper having dispersed therein 0.01 - 5.00 percent by weight of at least one compound selected from the carbide group consisting of TiC, MoC, SiC, TaC, WC and Fe3C.
Claim 7
Dependent Claim
37 words
A submarine coaxial cable as defined in claim 1 wherein said dispersion-type conductive material consists of pure copper having dispersed therein 0.01 - 5.00 percent by weight of 30 - 70 percent Ni-Cu alloy (by weight percent).
Claim 8
Dependent Claim
110 words
A submarine coaxial cable characterized by comprising a. an inner conductor b. an outer conductor disposed coaxially of said inner conductor and in spaced apart relation therewith to surround the same, c. an insulating material filling the space between said inner and outer conductors, and d. said inner and outer conductors being made of a dispersion type conductive material having a temperature coefficient of resistivity lower than that of pure copper and consisting of copper and 0.01 - 5.00 percent by weight of a finely divided powder disperSed in said copper, said finely divided powder being from the group consisting of metal oxides, ferrite, thermistor, carbides, and nickel-copper alloy powder.
Claim 9
Dependent Claim
110 words
A submarine coaxial cable characterized by comprising a. an inner conductor b. an outer conductor disposed coaxially of said inner conductor and in spaced apart relation therewith to surround the same, c. an insulating material filling the space between said inner and outer conductors, and d. said inner and outer conductors being made of a dispersion type conductive material having a temperature coefficient of resistivity lower than that of pure copper and consisting of copper and 0.01 - 5.00 percent by weight of a finely divided powder disperSed in said copper, said finely divided powder being from the group consisting of metal oxides, ferrite, thermistor, carbides, and nickel-copper alloy powder.
Claim 10
Dependent Claim
45 words
A submarine coaxial cable as defined in claim 7, wherein said dispersion-type conductive material consists of copper having 0.01-5.00 percent by weight of finely divided ferrite powder disposed therein, said ferrite powder being selected from the group consisting of MnCoFe2O4, BaFe12O19, NiZnFe2O4, NiCuFe2O4 and Li0.5Fe2.5O4.
Claim 11
Dependent Claim
74 words
A submarine coaxial cable as defined in claim 7 wherein said dispersion-type conductive material consists of pure copper having dispersed therein 0.01-5.00 percent by weight of finely divided thermistor powder, said thermistor powder consisting of, as a major component, oxides of transient elements selected from the group consisting of oxides of Mn, Ni, Co and Cu, and, as a minor component, oxides selected from the group consisting of Mo, Fe, Zr, Cr and V.
Claim 12
Dependent Claim
42 words
A submarine coaxial cable as defined in claim 7 wherein said dispersion-type conductive material consists of pure copper having dispersed 0.01-5.00 percent by weight of at least one compound selected from the oxide group consisting of MgO, MnO2, CrO2, V2O3 and Al2O3.
Claim 13
Dependent Claim
44 words
A submarine coaxial cable as defined in claim 7 wherein said dispersion-type conductive material consists of pure copper having dispersed therein 0.01-5.00 percent by weight of at least one compound selected from the carbide group consisting of TiC, MoC, SiC, TaC, WC and Fe3C.
Claim 14
Dependent Claim
35 words
A submarine coaxial cable as defined in claim 7 wherein said dispersion-type conductive material consists of pure copper having dispersed therein 0.01-5.00 percent by weight of 30 - 70 percent Ni-Cu alloy (by weight percent).
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |