Patent US2540089A successfully refreshed from Google Patents.
US2540089A
Expired / Lapsed
US
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Vehicle detector
Assignee: Eastern Ind Inc
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Filing: 1944-05-17
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Granted: 1951-02-06
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Expires: 1964-05-17
Abstract
No abstract record available.
Inventors
- 👤 John L Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:52
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/01; B; B61; B61L; B61L13/00; B61L13/002; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2045071A
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US2086742A
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US2268587A
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US2256539A
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US2409448A
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US2301929A
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US2420264A
Cited
US2402464A
Cited
US2412632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |