US3031658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air traffic control system
Assignee: Gilfillan Bros Inc
•
Filing: 1956-08-21
•
Granted: 1962-04-24
•
Expires: 1976-08-21
Abstract
No abstract record available.
Inventors
- 👤 David J Green
- 👤 Alvin Guy Van Alstyne
- 👤 Jr Garvin M Moore
- 👤 Quentin L Bonness
- 👤 Noland Albert Royal
- 👤 Olson Verland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:27
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/91; G01S13/913; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2429595A
Cited
US2543002A
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US2521697A
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US2458361A
Cited
US2613350A
Cited
US2613352A
Cited
US2709807A
Cited
US2776099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |