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Patent US2679034A successfully refreshed from Google Patents.
US2679034A
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Code integrity check for centralized traffic control systems
Assignee: SPX Technologies Inc
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Filing: 1952-02-26
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Granted: 1954-05-18
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Expires: 1972-02-26
Abstract
No abstract record available.
Inventors
- 👤 Reginald F Albrighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:36
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)
US2452589A
Cited
US2409696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |