Patent US3143591A successfully refreshed from Google Patents.
US3143591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cables under pressure
Assignee: Trefileries et Laminoirs Du Havre
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Filing: 1960-07-25
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Granted: 1964-08-04
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Expires: 1980-07-25
Abstract
No abstract record available.
Inventors
- 👤 Flamand Charles Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:56
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/306; H01B9/00; H01B9/06; H01B9/0611; H02; H02G; H02G15/00; H02G15/20; H02G15/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A HIGH VOLTAGE ELECTRIC CABLE UNDER FLUID PRESSURE COMPRISING WITHIN A FLUID TIGHT CASING AT LEAST ONE CORE CONDUCTOR AND A SOLID INSULATING SHEATH OF THERMOPLASTIC MATERIAL SURROUNDING SAID CORE, SAID MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENES, POLYPROPYLENES, POLYVINYLCHLORIDES, AND COPOLYMERS THEREOF, WITH THE INNER SURFACE THEEOF FACING SAID CASING, AN ANNULAR SPACE LOCATED BETWEEN SAID OUTER SSURFACE AND SAID CASING, AN AXIAL DUCT LOCATED WITHIN SAID CORE, PURE WATER UNDER A PRESSURE SUBSTANTIALLY COMPRISED BETWEEN 1 AND 25 KG./CM.2 HOUSED WITHIN SAID ANNULAR SPACE AND SAID AXIAL DUCT, SAID WATER HAVING AN ELECTRICAL RESISTIVITY SUBSTANTIALLY RANGING FROM 0.1 TO 2 MEGOHMS CM.2/CM., AND MEANS AFFORDING A CONTACT FOR SAID WATER WITH SAID INNER AND OUTER SURFACES OF SAID INSULATING SHEATH.
Claim 2
Dependent Claim
124 words
A HIGH VOLTAGE ELECTRIC CABLE UNDER FLUID PRESSURE COMPRISING WITHIN A FLUID TIGHT CASING AT LEAST ONE CORE CONDUCTOR AND A SOLID INSULATING SHEATH OF THERMOPLASTIC MATERIAL SURROUNDING SAID CORE, SAID MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENES, POLYPROPYLENES, POLYVINYLCHLORIDES, AND COPOLYMERS THEREOF, WITH THE INNER SURFACE THEEOF FACING SAID CASING, AN ANNULAR SPACE LOCATED BETWEEN SAID OUTER SSURFACE AND SAID CASING, AN AXIAL DUCT LOCATED WITHIN SAID CORE, PURE WATER UNDER A PRESSURE SUBSTANTIALLY COMPRISED BETWEEN 1 AND 25 KG./CM.2 HOUSED WITHIN SAID ANNULAR SPACE AND SAID AXIAL DUCT, SAID WATER HAVING AN ELECTRICAL RESISTIVITY SUBSTANTIALLY RANGING FROM 0.1 TO 2 MEGOHMS CM.2/CM., AND MEANS AFFORDING A CONTACT FOR SAID WATER WITH SAID INNER AND OUTER SURFACES OF SAID INSULATING SHEATH.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |