US3035167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway track circuit
Assignee: Westinghouse Air Brake Co
•
Filing: 1958-12-03
•
Granted: 1962-05-15
•
Expires: 1978-12-03
Abstract
No abstract record available.
Inventors
- 👤 Philip H Luft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:31
CPC Classifications
B; B61; B61L; B61L1/00; B61L1/18; B61L1/181; B61L1/187; B61L29/00; B61L29/08; B61L29/18; B61L29/22; B61L29/226
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2317562A
Cited
US2328656A
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US2501590A
Cited
US2887570A
Cited
US2887540A
Cited
US2931986A
Cited
US2903522A
Cited
US2930888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |