US2167709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wireless aerial system
Assignee: EMI Ltd
•
Filing: 1937-03-15
•
Granted: 1939-08-01
•
Expires: 1957-03-15
Abstract
No abstract record available.
Inventors
- 👤 Cork Edward Cecil
- 👤 Pawsey Joseph Lade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:14
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10; H01Q; H01Q9/00; H01Q9/04; H01Q9/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-07-31 | 1943-01-30 | 1943-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-31 | 1947-01-30 | 1947-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-31 | 1951-01-30 | 1951-08-01 | $7700.00 | Window Closed / Lapsed |