US2487622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-phase slot antenna system
Assignee: RCA Corp
•
Filing: 1946-02-28
•
Granted: 1949-11-08
•
Expires: 1966-02-28
Abstract
No abstract record available.
Inventors
- 👤 Robert S Wehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:01
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q21/00; H01Q21/24; H01Q21/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2151118A
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US2297202A
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US2199050A
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US2245693A
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US2349942A
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US2234293A
Cited
US2286179A
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US2289856A
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US2414266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |