US2855558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azimuth reference for high latitudes
Assignee: Unisys Corp
•
Filing: 1953-12-31
•
Granted: 1958-10-07
•
Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 Caesar F Fragola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:15
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0202; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2539411A
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US2561367A
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US2416646A
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US2524756A
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US2590780A
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US2686021A
Cited
US2726457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |