US2572043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blind landing system
Assignee: Individual
•
Filing: 1950-01-06
•
Granted: 1951-10-23
•
Expires: 1970-01-06
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Mcelhannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:17
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/82; G01S13/88; G01S13/91; G01S13/913; G01S7/00; G01S7/02; G01S7/04; G01S7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |