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US2649545A
Expired / Lapsed
US
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Loop antenna
Assignee: Zenith Electronics LLC
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Filing: 1951-02-28
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Granted: 1953-08-18
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Expires: 1971-02-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Spindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:45
CPC Classifications
H; H01; H01Q; H01Q5/00; H01Q5/30; H01Q5/307; H01Q5/342; H01Q5/357; H01Q5/364; H01Q5/371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2082812A
Cited
US2283914A
Cited
US2304446A
Cited
US2472106A
Cited
US2474480A
Cited
US2510010A
Cited
US2533529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |