Patent US2726325A successfully refreshed from Google Patents.
US2726325A
Expired / Lapsed
US
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Carrier-operated relay circuit
Assignee: RCA Corp
•
Filing: 1951-04-23
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Granted: 1955-12-06
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Expires: 1971-04-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Roy A Beers
- 👤 John R Neubauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:27
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2156809A
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US2287926A
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US2441963A
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US2459675A
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US2316902A
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US2361585A
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US2356364A
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US2487513A
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US2546987A
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US2590282A
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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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |