US2550700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-optical tracking apparatus
Assignee: Unisys Corp
•
Filing: 1943-08-19
•
Granted: 1951-05-01
•
Expires: 1963-08-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph H Lancor
- 👤 Frederick R Marindin
- 👤 Rawley D Mccoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:31
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/86
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US286833A
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US1684138A
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US1737079A
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US1883802A
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US1775399A
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US1959264A
Cited
US2014534A
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US1990494A
Cited
US2231929A
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US2308936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |