Patent US2555173A successfully refreshed from Google Patents.
US2555173A
Expired / Lapsed
US
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Ballast spreader
Assignee: SCIENT PRODUCTION CORP
•
Filing: 1948-07-03
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Granted: 1951-05-29
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Expires: 1968-07-03
Abstract
No abstract record available.
Inventors
- 👤 John B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:26
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/02; E01B27/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1667085A
Cited
US731676A
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US1535987A
Cited
US1689694A
Cited
US1662926A
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US1689806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |