Patent US3202754A successfully refreshed from Google Patents.
US3202754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined duct and electric cable
Assignee: Ericsson Inc
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Filing: 1962-03-07
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Granted: 1965-08-24
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Expires: 1982-03-07
Abstract
No abstract record available.
Inventors
- 👤 James P Ruch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:42
CPC Classifications
H; H02; H02G; H02G9/00; H02G9/02; H02G1/00; H02G1/06; H02G1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A REPLACEABLE-CONDUCTOR ELECTRIC POWER CABLE COMPRISING: (A) AN ELONGATED CONDUCTOR (A) ENERGIZED AT A SELECTED VOLTAGE AND FREQUENCY (B) SAID FREQUENCY BEING SELECTED FROM THE GROUP CONSISTING OF ALTERNATING CURRENT POWER FREQUENCIES AND DIRECT CURRENT, (B) A TUBULAR WALL OF ELECTRICAL INSULATION (A) HAVING AN INNER PERIPHERY (B) SURROUNDING SAID CONDUCTOR AND (C) ADEQUATE TO INSUATE SAID CONDUCTOR FROM GROUND AT SAID VOLTAGE, (C) AN ELECTRICAL CONDUCTING LINER COVERING SAID INNER PERIPHERY (D) SAID LINER BEING IN ELECTRICAL CONTACT WITH SAID CONDUCTOR AND HAVING THE SAME VOLTAGE AND FREQUENCY AS SAID CONDUCTOR, (E) SAID LINER DEFINING A SECTIONAL AREA AT LEAST TWICE THE SECTIONAL AREA OF SAID CONDUCTOR, THEREBY PERMITTING ANOTHER SUCH CONDUCTOR TO BE PULLED INTO SAID CABLE, AND (F) AIR AT ATMOSPHERIC PRESSURE BEING IN CONTACT WITH SAID ELONGATED CONDUCTOR AND SAID LINER WITHIN SAID CABLE.
Claim 2
Dependent Claim
138 words
A REPLACEABLE-CONDUCTOR ELECTRIC POWER CABLE COMPRISING: (A) AN ELONGATED CONDUCTOR (A) ENERGIZED AT A SELECTED VOLTAGE AND FREQUENCY (B) SAID FREQUENCY BEING SELECTED FROM THE GROUP CONSISTING OF ALTERNATING CURRENT POWER FREQUENCIES AND DIRECT CURRENT, (B) A TUBULAR WALL OF ELECTRICAL INSULATION (A) HAVING AN INNER PERIPHERY (B) SURROUNDING SAID CONDUCTOR AND (C) ADEQUATE TO INSUATE SAID CONDUCTOR FROM GROUND AT SAID VOLTAGE, (C) AN ELECTRICAL CONDUCTING LINER COVERING SAID INNER PERIPHERY (D) SAID LINER BEING IN ELECTRICAL CONTACT WITH SAID CONDUCTOR AND HAVING THE SAME VOLTAGE AND FREQUENCY AS SAID CONDUCTOR, (E) SAID LINER DEFINING A SECTIONAL AREA AT LEAST TWICE THE SECTIONAL AREA OF SAID CONDUCTOR, THEREBY PERMITTING ANOTHER SUCH CONDUCTOR TO BE PULLED INTO SAID CABLE, AND (F) AIR AT ATMOSPHERIC PRESSURE BEING IN CONTACT WITH SAID ELONGATED CONDUCTOR AND SAID LINER WITHIN SAID CABLE.
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |