US2908231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway vehicle structure
Assignee: General Steel Castings Corp
•
Filing: 1956-11-26
•
Granted: 1959-10-13
•
Expires: 1976-11-26
Abstract
No abstract record available.
Inventors
- 👤 Driemeyer George Fred
- 👤 James C Travilla
- 👤 Robert E Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:12
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/16; B61F5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US650511A
Cited
US1536137A
Cited
US1587286A
Cited
US1630574A
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US1895500A
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US2317398A
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US2466088A
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US2517671A
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US2492337A
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US2496644A
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US2610586A
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US2703057A
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US2797649A
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US2797650A
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DE944379C
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US2773456A
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US2740359A
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US2819685A
Cited
US2777401A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |