Patent US2974290A successfully refreshed from Google Patents.
US2974290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
V. h. f. television amplifier circuit
Assignee: Oak Manufacturing Co
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Filing: 1958-09-04
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Granted: 1961-03-07
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Expires: 1978-09-04
Abstract
No abstract record available.
Inventors
- 👤 Alexis N Azelickis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:25
CPC Classifications
H; H03; H03J; H03J3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2159944A
Cited
US2106226A
Cited
US2379168A
Cited
US2654058A
Cited
US2811590A
Cited
US2802066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |