US2997706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-frequency radar apparatus with rotatable back-to-back antennas
Assignee: Decca Record Co Ltd
•
Filing: 1959-01-28
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Granted: 1961-08-22
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Expires: 1979-01-28
Abstract
No abstract record available.
Inventors
- 👤 Easy Maurice Henry
- 👤 Burr Ronald Lawrence
- 👤 Street Leslie John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:52
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/30; G; G01; G01S; G01S1/00; G01S1/02; G01S13/00; G01S13/87; H01; H01Q; H01Q5/00; H01Q5/40; H01Q5/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2627069A
Cited
GB797367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |