US3020548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable radio direction finder
Assignee: ALLEN BRADFORD Inc
•
Filing: 1958-05-19
•
Granted: 1962-02-06
•
Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Jacobson Edward
- 👤 Siegelman Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:02
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2438680A
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US2485578A
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GB787653A
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US2840814A
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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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |