US2994875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slot array antenna having four principal beams, useful for doppler air navigation
Assignee: General Precision Inc
•
Filing: 1959-05-26
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Granted: 1961-08-01
•
Expires: 1979-05-26
Abstract
No abstract record available.
Inventors
- 👤 Stavis Gus
- 👤 George R Gamertsfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:32
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/004; G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2854666A
Cited
US2908001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |