US2536112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft landing system
Assignee: Unisys Corp
•
Filing: 1946-04-18
•
Granted: 1951-01-02
•
Expires: 1966-04-18
Abstract
No abstract record available.
Inventors
- 👤 Russell H Varian
- 👤 Jr Thomas M Ferrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:29
CPC Classifications
H; H01; H01Q; H01Q25/00; G; G01; G01S; G01S1/00; G01S1/02; H01Q21/00; H01Q21/06; H01Q21/08; H01Q21/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1872975A
Cited
US2097072A
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US2165256A
Cited
US2179570A
Cited
US2242910A
Cited
US2241907A
Cited
US2294882A
Cited
US2435988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |