US2441554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traffic detector
Assignee: Eastern Ind Inc
•
Filing: 1944-05-18
•
Granted: 1948-05-18
•
Expires: 1964-05-18
Abstract
No abstract record available.
Inventors
- 👤 John L Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:02
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/01; G08G1/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1062361A
Cited
US2014410A
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US1992214A
Cited
US2064882A
Cited
US2166090A
Cited
US2119811A
Cited
CH201126A
Cited
US2201146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |