Patent US3745231A successfully refreshed from Google Patents.
US3745231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filled telephone cables with irradiated polyethylene insulation
Assignee: General Cable Corp
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Filing: 1971-06-15
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Granted: 1973-07-10
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Expires: 1991-06-15
Abstract
Abstract This filled communication cable has polyethylene insulation on the conductors irradiated to avoid degrading of the polyethylene by contact with the filler material which is a grease. Ordinarily the filler material contains petrolatum as its major ingredient. The irradiation of the insulation is performed after the insulation is applied to the conductors and before the conductors are brought together in contact with the petrolatum in the cable core.
Inventors
- 👤 G Eager
- 👤 L Jachimowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:55
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/32; H01B13/322; H01B11/00; H01B7/00; H01B7/17; H01B7/28; H01B7/2806; H01B7/282; H01B7/285; Y; Y02; Y02A; Y02A30/00; Y02A30/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
The filled communication cable described in claim 1 and characterized by the filler material including petrolatum, and the polyethylene being irradiAted by electronic irradiation.
Claim 2
Dependent Claim
29 words
The filled cable described in claim 1 characterized by the conductors having extruded polyethylene insulation thereon, and the cross-linking being that produced after the insulation is on the conductor.
Claim 3
Dependent Claim
42 words
The filled communication cable described in claim 1 characterized by the filler material being a blend of petrolatum and polyethylene with the petrolatum the major ingredient of the blend, the insulation on the conductors being an extruded polyethylene coating irradiated after extrusion.
Claim 4
Independent Claim
166 words
The method of making a filled communication cable that comprises insulating individual conductors with polyethylene, irradiating the polyethylene, as it comes from the insulation applying and before gathering the conductors together, to partially cross-link the conductor insulation, bringing a plurality of conductors together in a core after coating the conductors with a grease that swells and degrades amorphous polyethylene as a result of continued contact of the insulation with the grease and to an extent that causes cracking of the insulation when the conductors are twisted together at cable ends, applying an open wrapping to the core to hold the conductors together in the core so that the interstitial spaces of the core remain filled with grease, applying grease as a circumferential coating on the core over the open wrapping, applying an electrostatic shield over the core and over the grease that covers the open wrapping to fill any clearances between the core and shield with said grease, and applying a plastic jacket over the shield.
Claim 5
Dependent Claim
27 words
The method described in claim 5 characterized by extruding the polyethylene insulation over the conductors, irradiating the polyethylene insulation after it has been extruded over the conductors.
Claim 6
Dependent Claim
16 words
The method described in claim 6 characterized by the irradiation being between 5 and 15 megarads.
Claim 7
Dependent Claim
122 words
The method of making a telephone cable as described in claim 5 characterized by applying the open wrapping directly to the conductors of the core to hold the conductors together in the core, applying grease that includes petrolatum as the circumferential coating on the core over the open wrapping and in the interstitial spaces of the core, and further characterized by irradiating the polyethylene insulation after it has been extruded over the conductors with irradiation between 5 and 15 megarads, and applying a corrugated electrostatic shield over the grease coating on the core by longitudinally and progressively folding over the core an aluminum strip having a thickness of substantially 8 mils and having a non-corrosive coating on both surfaces of said strip.
References Cited (Backward Citations)
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US3332138A
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US3507977A
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US3610814A
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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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |