US2622199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio aerial system
Assignee: Marconis Wireless Telegraph Co Ltd
•
Filing: 1948-10-11
•
Granted: 1952-12-16
•
Expires: 1968-10-11
Abstract
No abstract record available.
Inventors
- 👤 Ramsay John Forrest
- 👤 Peat John Dewar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:40
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2415094A
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US2460286A
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US2489288A
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US2432990A
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FR883665A
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US2414266A
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US2407068A
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US2482162A
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US2465416A
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US2433924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |