Patent US2845622A successfully refreshed from Google Patents.
US2845622A
Expired / Lapsed
US
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Direction sensitive radio system
Assignee: Unisys Corp
•
Filing: 1953-11-13
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Granted: 1958-07-29
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Expires: 1973-11-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Gamble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:51
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2429601A
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US2510692A
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US2682656A
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US2571129A
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US2585173A
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US2663848A
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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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |