Patent US1758945A successfully refreshed from Google Patents.
Patent US2032193A successfully refreshed from Google Patents.
US2032193A
Expired / Lapsed
US
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Electron tube system
Assignee: RCA Corp
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Filing: 1929-07-29
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Granted: 1936-02-25
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Expires: 1949-07-29
Abstract
No abstract record available.
Inventors
- 👤 Sidney Y White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/42; H03F1/48; H03F1/50
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) | 1939-02-24 | 1939-08-26 | 1940-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-02-24 | 1943-08-26 | 1944-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-02-24 | 1947-08-26 | 1948-02-25 | $7700.00 | Window Closed / Lapsed |