Patent DE2748858A1 successfully refreshed from Google Patents.
US2637024A
Expired / Lapsed
US
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Craft position plotting system
Assignee: Unisys Corp
•
Filing: 1947-10-29
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Granted: 1953-04-28
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Expires: 1967-10-29
Abstract
No abstract record available.
Inventors
- 👤 Lyman Joseph
- 👤 George B Litchford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:39
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |