Patent US2574868A successfully refreshed from Google Patents.
US2574868A
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Electron discharge tube circuit arrangement
Assignee: RCA Corp
•
Filing: 1947-10-18
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Granted: 1951-11-13
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Expires: 1967-10-18
Abstract
No abstract record available.
Inventors
- 👤 Green Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/04; H03F1/06; H03F3/00; H03F3/50; H03F3/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2165844A
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US2205880A
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US2211003A
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US2431333A
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US2302798A
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FR861809A
Cited
US2330109A
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US2393709A
Cited
US2450445A
Cited
US2463229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |