Patent US3540054A successfully refreshed from Google Patents.
US3540054A
Expired / Lapsed
US
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Radar antenna system for acquisition and tracking
Assignee: National Aeronautics and Space Administration
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Filing: 1968-10-09
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Granted: 1970-11-10
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Expires: 1988-10-09
Abstract
No abstract record available.
Inventors
- 👤 Richard F Broderick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:35
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/46; G01S3/48; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S3/38; G01S3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3025520A
Cited
US3148369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |