US2727232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna for radiating elliptically polarized electromagnetic waves
Assignee: North American Aviation Corp
•
Filing: 1952-07-19
•
Granted: 1955-12-13
•
Expires: 1972-07-19
Abstract
No abstract record available.
Inventors
- 👤 Stanley A Pryga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:57
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2412320A
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US2459768A
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US2452202A
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GB592760A
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US2562332A
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US2433924A
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US2479227A
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US2665382A
Cited
GB655045A
Cited
GB664150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |