US2509705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expander-contractor amplifier system
Assignee: RCA Corp
•
Filing: 1946-04-23
•
Granted: 1950-05-30
•
Expires: 1966-04-23
Abstract
No abstract record available.
Inventors
- 👤 William J Stolze
- 👤 Francis C Gow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:58
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2084119A
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US2473893A
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US2410550A
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US2444442A
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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) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |