Patent US2769601A successfully refreshed from Google Patents.
US2769601A
Expired / Lapsed
US
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Automatic radio control system
Assignee: Northrop Grumman Corp
•
Filing: 1950-08-18
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Granted: 1956-11-06
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Expires: 1970-08-18
Abstract
No abstract record available.
Inventors
- 👤 Jacob J Hagopian
- 👤 Stuart R Hennies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:47
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/0011; G05D1/0022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1483992A
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US2173154A
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US2401853A
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US2339011A
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US2397088A
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US2603433A
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US2551972A
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US2515254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |