US3025393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highway crossing signal control system
Assignee: SPX Technologies Inc
•
Filing: 1957-07-16
•
Granted: 1962-03-13
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Expires: 1977-07-16
Abstract
No abstract record available.
Inventors
- 👤 Crain Chester Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:58
CPC Classifications
B; B61; B61L; B61L1/00; B61L1/18; B61L1/181; B61L1/182; B61L29/00; B61L29/24; B61L29/28; B61L29/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1094894A
Cited
US1820170A
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US1960467A
Cited
US2162911A
Cited
US2317562A
Cited
US2703839A
Cited
US2896068A
Cited
US2930888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |