Patent US2757331A successfully refreshed from Google Patents.
US2757331A
Expired / Lapsed
US
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Thyratron power amplifier
Assignee: North American Aviation Corp
•
Filing: 1951-12-11
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Granted: 1956-07-31
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Expires: 1971-12-11
Abstract
No abstract record available.
Inventors
- 👤 Patrusky Nathan
- 👤 Dell E Jorgensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:12
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2088490A
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US1893766A
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US2055208A
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US2340875A
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US2400599A
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US2503039A
Cited
US2497908A
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US2467765A
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US2688721A
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US2570651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |