US2803710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuned high frequency amplifier
Assignee: TDK Micronas GmbH
•
Filing: 1953-04-21
•
Granted: 1957-08-20
•
Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Ervin M Bradburd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:21
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2156261A
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US2524821A
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US2551715A
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US2579820A
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US2554500A
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GB656760A
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US2714135A
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US2642533A
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US2706802A
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US2756338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |