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Patent US2799720A successfully refreshed from Google Patents.
US2799720A
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Gas-pressure electric cables
Assignee: Pirelli and C SpA
•
Filing: 1952-04-09
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Granted: 1957-07-16
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Expires: 1972-04-09
Abstract
No abstract record available.
Inventors
- 👤 Emanueli Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:06
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1939264A
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US1977325A
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US2147402A
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US2237402A
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US2253985A
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US2261742A
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US2326557A
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US2457436A
Cited
US2425851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |