Patent US2768286A successfully refreshed from Google Patents.
US2768286A
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Inductive train brake control system
Assignee: SPX Technologies Inc
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Filing: 1951-12-13
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Granted: 1956-10-23
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Expires: 1971-12-13
Abstract
No abstract record available.
Inventors
- 👤 Hugh C Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:14
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/12; B61L3/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1610692A
Cited
US1767578A
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US1484049A
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US2163520A
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US2313887A
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US2492388A
Cited
US2554056A
Cited
US2609498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |