US2559390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centralized traffic control system
Assignee: SPX Technologies Inc
•
Filing: 1947-07-03
•
Granted: 1951-07-03
•
Expires: 1967-07-03
Abstract
No abstract record available.
Inventors
- 👤 Blaisdell Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:29
CPC Classifications
B; B61; B61L; B61L7/00; B61L7/06; B61L7/08; B61L7/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2368626A
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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) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |