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Patent US3621119A successfully refreshed from Google Patents.
US3621119A
Expired / Lapsed
US
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Insulated conductor for communication cable
Assignee: Hitachi Cable Ltd
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Filing: 1968-09-30
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Granted: 1971-11-16
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Expires: 1988-09-30
Abstract
Abstract A paper-insulated conductor for communication cables in which layers of insulating paper surrounding the conductor are bonded to each other or the insulating paper is bonded to the conductor by a bonding agent so that the insulated conductor can be inserted into an insertion connector without becoming loose, jointing work with a jointing tool can easily be carried out, and any short circuit will not occur between the conductors within the cable. The insulated conductor has excellent electrical properties in spite of the use of the bonding agent.
Inventors
- 👤 Masao Sugiyama
- 👤 Toshio Suzuki
- 👤 Hajime Noda
- 👤 Saburo Kashimura
- 👤 Shozo Hato
- 👤 Hideo Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:24
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/10; H01B11/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
An insulated conductor for communication cables comprising a conductor, an insulating paper wrapped in two layers around said conductor, and a bonding agent between the inner layer of said insulating paper and said conductor bonding said inner layer to said conductor wherein the inner layer and the outer layer are not bonded by a bonding agent.
Claim 2
Dependent Claim
56 words
An insulated conductor for communication cables comprising a conductor, an insulating paper wrapped in two layers around said conductor, and a bonding agent between the inner layer of said insulating paper and said conductor bonding said inner layer to said conductor wherein the inner layer and the outer layer are not bonded by a bonding agent.
Claim 3
Dependent Claim
82 words
An insulated conductor for communication cables comprising a conductor of a round cross section, an insulating paper wrapped in two layers, inner and outer, around said conductor and a bonding agent applied only between said inner layer of said insulating paper and said conductor of a round cross section, wherein said inner layer of said insulating paper is bonded to said conductor by said bonding agent and said inner and outer layers of said insulating paper are not bonded to each other.
Claim 4
Dependent Claim
82 words
An insulated conductor for communication cables comprising a conductor of a round cross section, an insulating paper wrapped in two layers, inner and outer, around said conductor and a bonding agent applied only between said inner layer of said insulating paper and said conductor of a round cross section, wherein said inner layer of said insulating paper is bonded to said conductor by said bonding agent and said inner and outer layers of said insulating paper are not bonded to each other.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |