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Patent US2591976A successfully refreshed from Google Patents.
US2591976A
Expired / Lapsed
US
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Electron discharge device utilizing cavity resonators
Assignee: RCA Corp
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Filing: 1945-03-22
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Granted: 1952-04-08
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Expires: 1965-03-22
Abstract
No abstract record available.
Inventors
- 👤 Stinchfield John Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:04
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2217745A
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US2123728A
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GB509102A
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US2241976A
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US2348986A
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US2432608A
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US2417789A
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US2411151A
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US2410396A
Cited
US2414085A
Cited
US2548808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |