US2509283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directive antenna system
Assignee: RCA Corp
•
Filing: 1945-10-25
•
Granted: 1950-05-30
•
Expires: 1965-10-25
Abstract
No abstract record available.
Inventors
- 👤 Lester J Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/422; H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/16; H01Q3/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1931980A
Cited
US2054896A
Cited
US2083242A
Cited
US2370053A
Cited
US2321454A
Cited
US2419556A
Cited
US2422579A
Cited
US2429601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |