US2517591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar navigational training equipment
Assignee: Individual
•
Filing: 1945-01-03
•
Granted: 1950-08-08
•
Expires: 1965-01-03
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Nightenhelser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:45
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2110869A
Cited
US2312962A
Cited
US2359294A
Cited
US2438940A
Cited
US2438888A
Cited
US2442788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |