US2568568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft navigational aid
Assignee: Individual
•
Filing: 1947-03-10
•
Granted: 1951-09-18
•
Expires: 1967-03-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Stansbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1983079A
Cited
US2146724A
Cited
US1989086A
Cited
US2042490A
Cited
US2157122A
Cited
US2275970A
Cited
US2272068A
Cited
US2261272A
Cited
US2378604A
Cited
US2403603A
Cited
US2414444A
Cited
US2411494A
Cited
US2425317A
Cited
US2448041A
Cited
US2449978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |