US2516376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airway traffic control system
Assignee: SPX Technologies Inc
•
Filing: 1945-01-29
•
Granted: 1950-07-25
•
Expires: 1965-01-29
Abstract
No abstract record available.
Inventors
- 👤 Oscar S Field
- 👤 Sedgwick N Wight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:06
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999047A
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GB445976A
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US2112824A
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US2144203A
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US2267468A
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US2218907A
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US2198113A
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US2400232A
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US2405238A
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US2403626A
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US2405231A
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US2408773A
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US2423305A
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US2419525A
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US2417807A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |