US2467412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Navigation instrument
Assignee: Unisys Corp
•
Filing: 1944-06-09
•
Granted: 1949-04-19
•
Expires: 1964-06-09
Abstract
No abstract record available.
Inventors
- 👤 Robert L Wathen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:54
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US791785A
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US840569A
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US1275786A
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US1991892A
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US1981589A
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US1999047A
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US2226930A
Cited
US2225046A
Cited
US2262245A
Cited
US2264063A
Cited
GB538214A
Cited
US2235390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |