US2491542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Object detector and velocity indicator
Assignee: Unisys Corp
•
Filing: 1943-09-07
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Granted: 1949-12-20
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Expires: 1963-09-07
Abstract
No abstract record available.
Inventors
- 👤 John R Woodyard
- 👤 Edward L Ginzton
- 👤 Vincent R Learned
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/583
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21955E
Cited
US1995285A
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US1945952A
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US2193361A
Cited
US2223224A
Cited
US2402464A
Cited
US2400133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |