US3084208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground plastic pipeline system for laying high tension electric cables
Assignee: Pirelli and C SpA
•
Filing: 1957-04-19
•
Granted: 1963-04-02
•
Expires: 1977-04-19
Abstract
No abstract record available.
Inventors
- 👤 Palandri Giuseppe
- 👤 Priaroggia Paolo Gazzana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
H; H02; H02G; H02G9/00; H02G9/06; H01; H01B; H01B7/00; H01B7/17; H01B7/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A SYSTEM OF UNDERGROUND PLASTIC PIPELINES, AT LEAST ONE SELF CONTAINED HIGH TENSION ELECTRIC CABLE EXTENDING LENGTHWISE WITHIN THE SAME AND LONGITUDINALLY SLIDABLE OUT OF THE SAME, THE SPACE WITHIN THE PIPELINE NOT OCCUPIED BY THE CABLE OR CABLES BEING FILLED WITH A GOOD HEAT CONDUCTING LIQUID AND EACH CABLE WITHIN THE PIPELINE HAVING CABLE INSULATION ENCLOSED WITHIN AN ADHERENT RIGID LIQUID TIGHT SHEATH WHICH IS IMPERMEABLE BY SAID LIQUID, THE LIQUID BEING AT SUBSTANTIALLY ATMOSPHERIC PRESSURE SO THAT THE PRESSURE OF SAID CABLE INSULATION IS INDEPENDENT IS OF THE PRESSURE OF SAID FILLING LIQUID, SAID CABLE OR CABLES PLACED WITHIN THE UNDERGROUND PIPELINE BEING PROVIDED WITH AN ADDITIONAL SHEATH SURROUNDING THE FIRST SHEATH AND MADE OF A MATERIAL HAVING A LOW COEFFICIENT OF FRICTION WITH RESPECT TO THE MATERIAL CONSTITUTING THE PIPELINE.
Claim 2
Independent Claim
133 words
A SYSTEM OF UNDERGROUND PLASTIC PIPELINES, AT LEAST ONE SELF CONTAINED HIGH TENSION ELECTRIC CABLE EXTENDING LENGTHWISE WITHIN THE SAME AND LONGITUDINALLY SLIDABLE OUT OF THE SAME, THE SPACE WITHIN THE PIPELINE NOT OCCUPIED BY THE CABLE OR CABLES BEING FILLED WITH A GOOD HEAT CONDUCTING LIQUID AND EACH CABLE WITHIN THE PIPELINE HAVING CABLE INSULATION ENCLOSED WITHIN AN ADHERENT RIGID LIQUID TIGHT SHEATH WHICH IS IMPERMEABLE BY SAID LIQUID, THE LIQUID BEING AT SUBSTANTIALLY ATMOSPHERIC PRESSURE SO THAT THE PRESSURE OF SAID CABLE INSULATION IS INDEPENDENT IS OF THE PRESSURE OF SAID FILLING LIQUID, SAID CABLE OR CABLES PLACED WITHIN THE UNDERGROUND PIPELINE BEING PROVIDED WITH AN ADDITIONAL SHEATH SURROUNDING THE FIRST SHEATH AND MADE OF A MATERIAL HAVING A LOW COEFFICIENT OF FRICTION WITH RESPECT TO THE MATERIAL CONSTITUTING THE PIPELINE.
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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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |