US2520922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic navigator and indicator
Assignee: Individual
•
Filing: 1943-05-25
•
Granted: 1950-09-05
•
Expires: 1963-05-25
Abstract
No abstract record available.
Inventors
- 👤 Richard J Framme
- 👤 Hubert G Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:50
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1958258A
Cited
US1924257A
Cited
US2051974A
Cited
US2372184A
Cited
US2272607A
Cited
US2372185A
Cited
US2280117A
Cited
US2323337A
Cited
US2321606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |