US4262164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telecommunications multipair cable
Assignee: AT&T Inc
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Filing: 1979-11-27
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Granted: 1981-04-14
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Expires: 1999-11-27
Abstract
Abstract A multipair telephone cable (50) has been specifically developed for voice frequency and T1 carrier frequency transmission between cities. The copper wire gauge, dielectric diameter, and insulation expansion are uniquely designed so that this single cable design can be used for either air core or waterproof versions of the cable. Advantageously, both cable versions are compatible with existing carrier and voice frequency electronics. Also, the load coil spacing for voice frequency transmission and the regenerative repeater spacing for carrier transmission coincide in both versions.
Inventors
- 👤 Wendell G. Nutt
- 👤 Joseph P. Savage, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:11
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/02; H01B7/0233; H01B11/00; H01B11/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
A telecommunications multipair cable (50) comprising one or more units (40) each comprising a plurality of insulated conductors (10) arranged in twisted pairs, each conductor comprising a copper wire (12) having an insulative dielectric layer (14) of polyolefin expanded with an inert gas, characterized in that: each copper wire has a diameter in a range from approximately 19.5 mils to 21 mils; the dielectric layer has an outside diameter in a range from approximately 46 mils to 52 mils; and wherein the dielectric layer is expanded by an amount in a range from 30 percent to 50 percent.
Claim 2
Dependent Claim
98 words
A telecommunications multipair cable (50) comprising one or more units (40) each comprising a plurality of insulated conductors (10) arranged in twisted pairs, each conductor comprising a copper wire (12) having an insulative dielectric layer (14) of polyolefin expanded with an inert gas, characterized in that: each copper wire has a diameter in a range from approximately 19.5 mils to 21 mils; the dielectric layer has an outside diameter in a range from approximately 46 mils to 52 mils; and wherein the dielectric layer is expanded by an amount in a range from 30 percent to 50 percent.
Claim 3
Dependent Claim
136 words
A telecommunications multipair cable (50) comprising one or more units (40) each comprising a plurality of insulated conductors (11) arranged in twisted pairs, each conductor comprising a copper wire (13) having an insulative dielectric layer (15) comprising a first polyolefin coat (17) expanded with an inert gas, and thereover, a second coat (19) of solid polyolefin, with the first coat constituting the major fraction of the thickness of the dielectric layer, characterized in that: each copper wire has a diameter in a range from approximately 19.5 to 21 mils; the dielectric layer has an outside diameter in a range from approximately 46 to 52 mils; wherein the first coat is expanded by an amount in a range from 35 percent to 55 percent; and wherein the second coat has a thickness of 1.0 to 2.5 mils.
Claim 4
Dependent Claim
136 words
A telecommunications multipair cable (50) comprising one or more units (40) each comprising a plurality of insulated conductors (11) arranged in twisted pairs, each conductor comprising a copper wire (13) having an insulative dielectric layer (15) comprising a first polyolefin coat (17) expanded with an inert gas, and thereover, a second coat (19) of solid polyolefin, with the first coat constituting the major fraction of the thickness of the dielectric layer, characterized in that: each copper wire has a diameter in a range from approximately 19.5 to 21 mils; the dielectric layer has an outside diameter in a range from approximately 46 to 52 mils; wherein the first coat is expanded by an amount in a range from 35 percent to 55 percent; and wherein the second coat has a thickness of 1.0 to 2.5 mils.
References Cited (Backward Citations)
US4058669A
Cited
US4174236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |