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US3054560A
Expired / Lapsed
US
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Computer test and change-over circuit
Assignee: Westinghouse Air Brake Co
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Filing: 1958-02-04
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Granted: 1962-09-18
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Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Robert R Hartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:35
CPC Classifications
B; B61; B61L; B61L17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |