US2752091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground position indicator system
Assignee: Unisys Corp
•
Filing: 1953-10-12
•
Granted: 1956-06-26
•
Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 Henry F Mckenney
- 👤 George A Lieske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985265A
Cited
US1985266A
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US2406836A
Cited
US2434270A
Cited
US2428770A
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US2425346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-26 | 1959-12-26 | 1960-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-26 | 1963-12-26 | 1964-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-26 | 1967-12-26 | 1968-06-26 | $7700.00 | Window Closed / Lapsed |