Patent US2474898A successfully refreshed from Google Patents.
US2474898A
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Electromagnetic resonator of the magnetron type
Assignee: AT&T Inc
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Filing: 1944-04-05
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Granted: 1949-07-05
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Expires: 1964-04-05
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Heising
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1581520A
Cited
US2084867A
Cited
US2063342A
Cited
US2164922A
Cited
US2250698A
Cited
US2247077A
Cited
US2348986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-04 | 1953-01-03 | 1953-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-04 | 1957-01-03 | 1957-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-04 | 1961-01-03 | 1961-07-05 | $7700.00 | Window Closed / Lapsed |