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Patent US2972964A successfully refreshed from Google Patents.
US2972964A
Expired / Lapsed
US
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Machine for ramming the ballast of railway lines
Assignee: Matisa Materiel Industriel SA
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Filing: 1958-01-22
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Granted: 1961-02-28
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Expires: 1978-01-22
Abstract
No abstract record available.
Inventors
- 👤 Allemann Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA509019A
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US1552611A
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US1767268A
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US1740538A
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US2536887A
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DE830352C
Cited
US2706061A
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US2821935A
Cited
US2791971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |