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Patent US2574696A successfully refreshed from Google Patents.
US2574696A
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Radio alarm transmitting, recording, and signaling system
Assignee: JOHN NATHANSON
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Filing: 1949-03-03
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Granted: 1951-11-13
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Expires: 1969-03-03
Abstract
No abstract record available.
Inventors
- 👤 Paul E Fischler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
G; G08; G08B; G08B25/00; G08B25/01; G08B25/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1567326A
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US1919409A
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US2067705A
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US2250834A
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US2433288A
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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) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |