US3609207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-voltage electrical cables
Assignee: Pirelli and C SpA
•
Filing: 1968-07-10
•
Granted: 1971-09-28
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Expires: 1988-07-10
Abstract
Abstract High-voltage electrical cables having tapes of synthetic plastic material which form separating insulating layers. The tapes are formed with protuberances which facilitate the flow of insulating fluid through the cables.
Inventors
- 👤 Gabriele Maschio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:05
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/06; H01B9/0611; H01B7/00; H01B7/02; H01B7/0208
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
A high-voltage electrical cable as in claim 1 wherein said protuberances are distributed uniformly on the surface of the tape.
Claim 2
Dependent Claim
29 words
An electric cable as in claim 1 in which the tapes of synthetic plastic material constituting the separating insulating means have a thickness ranging from 0.04 to 0.20 millimeters.
Claim 3
Dependent Claim
20 words
An electric cable as in claim 1 in which said protuberances have a height ranging from 0.01 to 0.20 millimeters.
Claim 4
Dependent Claim
27 words
An electric cable as in claim 1 wherein the material constituting the separating insulating means is of the same material as the insulating tapes forming said layers.
Claim 5
Dependent Claim
21 words
An electric cable as in claim 1 wherein said separating insulating tapes have said protuberances and recesses on both surfaces thereof.
References Cited (Backward Citations)
US463107A
Cited
US471588A
Cited
CA623731A
Cited
US1939264A
Cited
GB485400A
Cited
US3250850A
Cited
US3223773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |