Patent US6428472B1 successfully refreshed from Google Patents.
US2467681A
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US
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Freight car
Assignee: Pennsylvania Railroad Co
•
Filing: 1946-09-25
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Granted: 1949-04-19
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Expires: 1966-09-25
Abstract
No abstract record available.
Inventors
- 👤 Rex R Mckinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:56
CPC Classifications
B; B61; B61D; B61D45/00; B61D45/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20860E
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US717316A
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US841777A
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US1227703A
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US1238874A
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US1702169A
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US2091869A
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US2359109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |