US2477962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency shift tuning indicator system
Assignee: PRESS WIRELESS Inc
•
Filing: 1945-09-12
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Granted: 1949-08-02
•
Expires: 1965-09-12
Abstract
No abstract record available.
Inventors
- 👤 Reynold S Chapin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:33
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2211750A
Cited
US2333990A
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US2309481A
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US2387496A
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US2423616A
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US2423617A
Cited
US2412482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |