Patent US2990786A successfully refreshed from Google Patents.
US2990786A
Expired / Lapsed
US
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Apparatus for raising railroad tracks
Assignee: Individual
•
Filing: 1958-12-03
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Granted: 1961-07-04
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Expires: 1978-12-03
Abstract
No abstract record available.
Inventors
- 👤 Royce G Kershaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:11
CPC Classifications
E; E01; E01B; E01B29/00; E01B29/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR663606A
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US2050179A
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US2587324A
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US2693769A
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FR1076144A
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US2760440A
Cited
US2799230A
Cited
GB794235A
Cited
AT201642B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |