US2475778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical cavity resonator
Assignee: AT&T Inc
•
Filing: 1946-10-17
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Granted: 1949-07-12
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Expires: 1966-10-17
Abstract
No abstract record available.
Inventors
- 👤 Thaddeus C Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1101692A
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US2169126A
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US2233263A
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US2296721A
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US2405277A
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US2426177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |