Patent US2434838A successfully refreshed from Google Patents.
US2434838A
Expired / Lapsed
US
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Car truck
Assignee: American Steel Foundries
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Filing: 1944-04-21
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Granted: 1948-01-20
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Expires: 1964-04-21
Abstract
No abstract record available.
Inventors
- 👤 Robert B Cottrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:01
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US716294A
Cited
US972921A
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US2141767A
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US2257109A
Cited
US2324267A
Cited
US2338857A
Cited
US2295557A
Cited
US2377178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-19 | 1951-07-21 | 1952-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-19 | 1955-07-21 | 1956-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-19 | 1959-07-21 | 1960-01-20 | $7700.00 | Window Closed / Lapsed |