US2807714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination t.-r. gas switching tube and a gas r. f. antenna tube
Assignee: Individual
•
Filing: 1948-05-14
•
Granted: 1957-09-24
•
Expires: 1968-05-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Owen F Foin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:54
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2424984A
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US2454761A
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US2580389A
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US2403303A
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US2526911A
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US2412751A
Cited
GB589958A
Cited
US2618777A
Cited
US2582205A
Cited
US2594732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |