Patent US2666129A successfully refreshed from Google Patents.
US2666129A
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System for controlling oscillator grid current
Assignee: National Cylinder Gas Co
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Filing: 1948-03-05
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Granted: 1954-01-12
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Expires: 1968-03-05
Abstract
No abstract record available.
Inventors
- 👤 Carl E Ellsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:14
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/48; H05B6/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2252919A
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GB542395A
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US2416172A
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US2453529A
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US2439286A
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US2420857A
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US2588304A
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US2493269A
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US2517948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |