Patent US2895431A successfully refreshed from Google Patents.
US2895431A
Expired / Lapsed
US
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Freight car bulkhead
Assignee: FORD GRAIN DOOR Co
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Filing: 1957-04-22
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Granted: 1959-07-21
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Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Barton H Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:14
CPC Classifications
B; B61; B61D; B61D45/00; B61D45/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2116260A
Cited
US2310860A
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US2361081A
Cited
US2483523A
Cited
US2462309A
Cited
US2669402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |