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Patent US2910578A successfully refreshed from Google Patents.
US2910578A
Expired / Lapsed
US
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Automatic control of railway classification yard switches
Assignee: Westinghouse Air Brake Co
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Filing: 1955-12-23
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Granted: 1959-10-27
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Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Karlet
- 👤 Tsiang Sih Hsuin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
B; B61; B61L; B61L17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2700728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |