US2720637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traffic signal with time lapse indication
Assignee: Individual
•
Filing: 1954-11-03
•
Granted: 1955-10-11
•
Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 Norman R Hastings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:23
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/09; G08G1/096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1467847A
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US1756907A
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US1989984A
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US2254676A
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FR835347A
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US2258764A
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US2317538A
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US2480290A
Cited
US2534992A
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US2612548A
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US2577173A
Cited
US2666509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |