US2474238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single null loop antenna
Assignee: Individual
•
Filing: 1945-06-27
•
Granted: 1949-06-28
•
Expires: 1965-06-27
Abstract
No abstract record available.
Inventors
- 👤 Myron Y Eck
- 👤 Jerome J Hodapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE556169C
Cited
US1847872A
Cited
FR731965A
Cited
US2169742A
Cited
US2062129A
Cited
US2283935A
Cited
US2337324A
Cited
US2337965A
Cited
US2354332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |