US2776099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air traffic control system
Assignee: Unisys Corp
•
Filing: 1953-01-05
•
Granted: 1957-01-01
•
Expires: 1973-01-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas M Ferrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0202; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2224182A
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US2422025A
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US2472129A
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US2541277A
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US2526682A
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US2582588A
Cited
US2617705A
Cited
US2540150A
Cited
US2610226A
Cited
US2637848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |