Patent US2939141A successfully refreshed from Google Patents.
US2939141A
Expired / Lapsed
US
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Omnirange beacon antennas
Assignee: TDK Micronas GmbH
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Filing: 1956-09-25
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Granted: 1960-05-31
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Expires: 1976-09-25
Abstract
No abstract record available.
Inventors
- 👤 Anthony M Casabona
- 👤 James S Engel
- 👤 Lucanera Constantino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:50
CPC Classifications
H; H01; H01Q; H01Q25/00; G; G01; G01S; G01S1/00; G01S1/02; H01Q3/00; H01Q3/12; H01Q3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2461005A
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US2369808A
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US2549721A
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US2413085A
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US2567220A
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US2599896A
Cited
US2677766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |