US2629088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centralized traffic controlling system for railroads
Assignee: SPX Technologies Inc
•
Filing: 1950-09-30
•
Granted: 1953-02-17
•
Expires: 1970-09-30
Abstract
No abstract record available.
Inventors
- 👤 Hugh C Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:34
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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US2409696A
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US2409698A
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US2409697A
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US2448487A
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US2504999A
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US2554886A
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US2578653A
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US2609451A
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US2609452A
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US2592737A
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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) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |