US2790857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Output or input circuits for vacuum tubes
Assignee: RCA Corp
•
Filing: 1954-04-01
•
Granted: 1957-04-30
•
Expires: 1974-04-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas M Gluyas
- 👤 Leslie L Koros
- 👤 Raymond N Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:54
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2426185A
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US2379047A
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US2434508A
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US2462866A
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US2421784A
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US2543721A
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US2523307A
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US2481456A
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US2551715A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |