US2719230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual frequency antenna
Assignee: General Electric Co
•
Filing: 1952-05-10
•
Granted: 1955-09-27
•
Expires: 1972-05-10
Abstract
No abstract record available.
Inventors
- 👤 Allen E Smoll
- 👤 David L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:18
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q5/00; H01Q5/30; H01Q5/307; H01Q5/342; H01Q5/35; H01Q5/50; H01Q5/55; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2364371A
Cited
US2408425A
Cited
US2425488A
Cited
US2438987A
Cited
US2547416A
Cited
US2514779A
Cited
US2669657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |