US2500430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cavity resonator oscillator device
Assignee: AT&T Inc
•
Filing: 1944-07-28
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Granted: 1950-03-14
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Expires: 1964-07-28
Abstract
No abstract record available.
Inventors
- 👤 John R Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:42
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/06; H01J25/50; H01J25/52; H01J25/54; H01J25/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2241119A
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US2153728A
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US2250698A
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US2272211A
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US2300052A
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US2247077A
Cited
US2396044A
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US2425345A
Cited
US2415242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |