US2640443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway vehicle framing
Assignee: General Steel Castings Corp
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Filing: 1950-09-29
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Granted: 1953-06-02
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Expires: 1970-09-29
Abstract
No abstract record available.
Inventors
- 👤 Albert M Schieler
- 👤 Edwin C Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:46
CPC Classifications
B; B61; B61F; B61F1/00; B61F1/08; B61F1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |