US3128446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traffic actuated control system
Assignee: Laboratory For Electronics Inc
•
Filing: 1957-10-03
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Granted: 1964-04-07
•
Expires: 1977-10-03
Abstract
No abstract record available.
Inventors
- 👤 John L Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:13
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/07; G08G1/081
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
IN A TRAFFIC CONTROL SYSTEM, MEANS FOR PROVIDING TWO PERIODIC ELECTRICAL WAVE ENERGIES, ONE OF WHICH IS SHIFTING PROGRESSIVELY IN PHASE RELATION TO THE OTHER AT A CONTROLLED SLOW TIME RATE TO PROVIDE PHASE COINCIDENCES AT TIME INTERVALS OF THE ORDER OF THE DESIRED TRAFFIC SIGNAL TIME CYCLE, TRAFFIC ACTUATED MEANS FOR RESPONDING TO TRAFFIC, COINCIDENCE RESPONSIVE MEANS FOR RESPONDING TO PHASE COINCIDENCE OF SAID TWO WAVE ENERGIES, AND MEANS FOR CONTROLLING A TRAFFIC SIGNAL CHANGE IN RESPONSE TO CONJOINT OPERATION OF SAID TRAFFIC ACTUATED MEANS AND SAID COINCIDENCE RESPONSIVE MEANS.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |