US2616076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air traffic control system
Assignee: Unisys Corp
•
Filing: 1949-04-20
•
Granted: 1952-10-28
•
Expires: 1969-04-20
Abstract
No abstract record available.
Inventors
- 👤 Lyman Joseph
- 👤 George B Litchford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:56
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78; G01S13/785; G01S13/787; G01S7/00; G01S7/003; G01S7/02; G01S7/40; G01S7/4004; G01S7/4026; G01S7/403; G01S7/4034; G01S7/4052; G01S7/4082; G01S7/4091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2252083A
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US2421106A
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US2480123A
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US2513282A
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US2517540A
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US2467202A
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US2483097A
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US2490268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |