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Patent US2939507A successfully refreshed from Google Patents.
US2939507A
Expired / Lapsed
US
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Freight car wall straightener
Assignee: Evans Products Co
•
Filing: 1956-10-12
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Granted: 1960-06-07
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Expires: 1976-10-12
Abstract
No abstract record available.
Inventors
- 👤 Fred B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:17
CPC Classifications
B; B21; B21D; B21D1/00; B21D1/14; Y; Y10; Y10S; Y10S72/00; Y10S72/705
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE392347C
Cited
US1787095A
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US1879979A
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US2334080A
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US2605658A
Cited
US2696240A
Cited
US2597103A
Cited
US2725917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |