Patent US3598691A successfully refreshed from Google Patents.
US3598691A
Expired / Lapsed
US
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Multi-ply paper for insulating high tension electric cables
Assignee: Pirelli and C SpA
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Filing: 1968-03-08
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Granted: 1971-08-10
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Expires: 1988-03-08
Abstract
Abstract PAPER TAPE FOR INSULATING HIGH TENSION CABLES IS PRODUCED WITH A MULTI-LAYER CONSTRUCTION. A LOW DENSITY CORE LAYER IS FACED ON ONE OR BOTH SIDES WITH THIN HIGH IMPERMEABILITY LAYERS. THE DIELECTRIC STRENGTH IS A FUNCTION OF THE LATTER WHILE THE IMPREGNABILITY AND LOSS FACTOR IS A FUNCTION OF THE FORMER. ALSO AN ELECTRIC CABLE INSULATED WITH SUCH A TAPE IS DISCLOSED.
Inventors
- 👤 Franco Pasini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:11
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/30; H01B3/00; H01B3/18; H01B3/48; H01B3/485; H01B7/00; H01B7/02; H01B7/0208; H01B7/0225; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24992; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |