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US2542018A
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Compass
Assignee: Unisys Corp
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Filing: 1944-09-28
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Granted: 1951-02-20
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Expires: 1964-09-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas M Ferrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:39
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22409E
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US1863415A
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US2038059A
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US2178252A
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US2249649A
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US2309853A
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US2373096A
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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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |