Patent US2493569A successfully refreshed from Google Patents.
US2493569A
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US
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Composite loop antenna system
Assignee: General Electric Co
•
Filing: 1946-05-13
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Granted: 1950-01-03
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Expires: 1966-05-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Burton P Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:18
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/06; H01Q21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2188389A
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US2267889A
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US2239724A
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US2289856A
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US2293136A
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US2324462A
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US2405123A
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US2393981A
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US2391026A
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US2447879A
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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) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |