US2907982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centralized traffic control system for railroads
Assignee: SPX Technologies Inc
•
Filing: 1953-07-10
•
Granted: 1959-10-06
•
Expires: 1973-07-10
Abstract
No abstract record available.
Inventors
- 👤 William M Barker
- 👤 Brockman Lyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:33
CPC Classifications
B; B61; B61L; B61L7/00; B61L7/06; B61L7/08; B61L7/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2348555A
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US2549667A
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US2580155A
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US2762038A
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US2819410A
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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) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |