Patent US2504112A successfully refreshed from Google Patents.
US2504112A
Expired / Lapsed
US
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End underframe construction for vehicles, especially railway cars
Assignee: ThyssenKrupp Budd Co
•
Filing: 1945-04-17
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Granted: 1950-04-18
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Expires: 1965-04-17
Abstract
No abstract record available.
Inventors
- 👤 Albert G Dean
- 👤 Walter B Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:30
CPC Classifications
B; B61; B61F; B61F1/00; B61F1/08; B61F1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US998697A
Cited
US1164019A
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US1771090A
Cited
FR715869A
Cited
US2122159A
Cited
US2132232A
Cited
US2143216A
Cited
US2331891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |