US2744249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna feed systems
Assignee: RCA Corp
•
Filing: 1953-01-30
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Granted: 1956-05-01
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Expires: 1973-01-30
Abstract
No abstract record available.
Inventors
- 👤 Edward H Shively
- 👤 William S Brandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:01
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/0006; H01Q21/0037; H01Q21/0043; H01Q21/0062; H01Q13/00; H01Q13/10; H01Q13/12; H01Q21/06; H01Q21/20; H01Q21/205; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |