Patent US2724474A successfully refreshed from Google Patents.
Patent US2799736A successfully refreshed from Google Patents.
US2799736A
Expired / Lapsed
US
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Radio frequency amplifier
Assignee: Standard Coil Products Co Inc
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Filing: 1953-11-03
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Granted: 1957-07-16
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Expires: 1973-11-03
Abstract
No abstract record available.
Inventors
- 👤 Robert J Hannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:57
CPC Classifications
H; H03; H03J; H03J3/00; H03F; H03F1/00; H03F1/08; H03F1/10; H03F3/00; H03F3/50; H03F3/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |