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US2814002A
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High voliage switching installations
Assignee: Hawker Siddeley Switchgear Ltd
•
Filing: 1953-08-24
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Granted: 1957-11-19
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Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 Nicholas Alfred James
- 👤 Buttrey Ronald Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:12
CPC Classifications
H; H02; H02B; H02B11/00; H02B11/18; H02B11/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1878999A
Cited
US1740558A
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US1929983A
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US2353518A
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US2379188A
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US2600304A
Cited
US2645699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |