US2585855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar ground-controlled approach system for aircraft
Assignee: United States, WAR, Secretary of
•
Filing: 1944-08-11
•
Granted: 1952-02-12
•
Expires: 1964-08-11
Abstract
No abstract record available.
Inventors
- 👤 Chalmers W Sherwin
- 👤 Lawrence H Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:33
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/88; G01S17/93; G01S17/933; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/426; G01S13/88; G01S13/91; G01S13/913; G01S7/00; G01S7/003; G01S7/02; G01S7/04; G01S7/06; G01S7/10; H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/17; H01Q19/175
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2231929A
Cited
US2241809A
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US2415094A
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US2189549A
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US2412702A
Cited
US2228266A
Cited
US2422361A
Cited
US2421747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |