Patent US2232850A successfully refreshed from Google Patents.
US2232850A
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US
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Electron discharge tube circuits
Assignee: RCA Corp
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Filing: 1939-01-04
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Granted: 1941-02-25
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Expires: 1959-01-04
Abstract
No abstract record available.
Inventors
- 👤 Haantjes Johan
- 👤 Tellegen Bernardus Do Hubertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:29
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; F; F24; F24F; F24F6/00; F24F6/02; F24F6/06; H03D; H03D7/00; H03D7/06; H03D7/10; H03F; H03F1/00; H03F1/34; H03F1/36; H03F3/00; H03F3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-25 | 1944-08-26 | 1945-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-25 | 1948-08-26 | 1949-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-25 | 1952-08-26 | 1953-02-25 | $7700.00 | Window Closed / Lapsed |