Patent US2552259A successfully refreshed from Google Patents.
US2806944A
Expired / Lapsed
US
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Switching system for standby receiver and transmitter
Assignee: RCA Corp
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Filing: 1955-04-20
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Granted: 1957-09-17
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Expires: 1975-04-20
Abstract
No abstract record available.
Inventors
- 👤 Sheffield Berthold
- 👤 Jr Raymond M Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:51
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |