Patent US3077514A successfully refreshed from Google Patents.
US3077514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power cables
Assignee: —
•
Filing: —
•
Granted: 1963-02-12
•
Expires: 1980-02-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:15
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN ELECTRIC POWER CABLE COMPRISING AT LEAST ONE CONDUCTOR SURROUNDED BY A HELICAL WRAPPING OF DIELECTRIC TAPE AND HAVING A DIELECTRIC LIQUID SUBSTANTIALLY IMPREGNATING SAID WRAPPING, IN SAID DIELECTRIC TAPE IS A THIN SUBSTANTIALLY IMPERVIOUS SHEET OF A SOLID ISOTACTIC POLYMERIC MATERIAL OF THE GROUP CONSISTING OF POLYETHYLENE, POLYPROPYLENE, POLYBUTYLENE, POLYSTYRENE, POLYTETRAFLUOROETHYLENE, AND POLYCARBONATES BONDED TO A THIN POROUS LAYER OF FINELY DIVIDED PARTICLES OF SOLID POLYMERIC MATERIAL SELECTED FROM SAID GROUP, SAID POROUS LAYER EXTENDING THE FULL WIDTH OF SAID TAPE, SAID WRAPPING HAVING SLIGHT HELICAL FISSURES EXISTING THEREIN BETWEEN ADJACENT TURNS OF THE TAPE INTERCONNECTING SUCCESSIVE LAYERS OF SAID POROUS LAYER AND THEREBY PERMITTING EASY PENETRATION OF THE DIELECTRIC LIQUID THROUGHOUT THE WRAPPING.
Claim 2
Dependent Claim
115 words
AN ELECTRIC POWER CABLE COMPRISING AT LEAST ONE CONDUCTOR SURROUNDED BY A HELICAL WRAPPING OF DIELECTRIC TAPE AND HAVING A DIELECTRIC LIQUID SUBSTANTIALLY IMPREGNATING SAID WRAPPING, IN SAID DIELECTRIC TAPE IS A THIN SUBSTANTIALLY IMPERVIOUS SHEET OF A SOLID ISOTACTIC POLYMERIC MATERIAL OF THE GROUP CONSISTING OF POLYETHYLENE, POLYPROPYLENE, POLYBUTYLENE, POLYSTYRENE, POLYTETRAFLUOROETHYLENE, AND POLYCARBONATES BONDED TO A THIN POROUS LAYER OF FINELY DIVIDED PARTICLES OF SOLID POLYMERIC MATERIAL SELECTED FROM SAID GROUP, SAID POROUS LAYER EXTENDING THE FULL WIDTH OF SAID TAPE, SAID WRAPPING HAVING SLIGHT HELICAL FISSURES EXISTING THEREIN BETWEEN ADJACENT TURNS OF THE TAPE INTERCONNECTING SUCCESSIVE LAYERS OF SAID POROUS LAYER AND THEREBY PERMITTING EASY PENETRATION OF THE DIELECTRIC LIQUID THROUGHOUT THE WRAPPING.
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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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |