US3384869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for freeway access ramp traffic control
Assignee: SPX Technologies Inc
•
Filing: 1966-01-17
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Granted: 1968-05-21
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Expires: 1986-01-17
Abstract
No abstract record available.
Inventors
- 👤 Leslie F Waldron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:40
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/07; G08G1/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3304539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |