US2647298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrahigh-frequency electron discharge device
Assignee: RCA Corp
•
Filing: 1948-09-30
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Granted: 1953-08-04
•
Expires: 1968-09-30
Abstract
No abstract record available.
Inventors
- 👤 Nicholas E Pryslak
- 👤 Kenneth M Mclaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:57
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J19/46; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1872344A
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US1994557A
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US2107903A
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US2162234A
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US2166830A
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US2277871A
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US2428610A
Cited
US2433339A
Cited
US2422945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |