US2444637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate metal sill brace and draft gear stop
Assignee: ACF Industries Inc
•
Filing: 1944-02-05
•
Granted: 1948-07-06
•
Expires: 1964-02-05
Abstract
No abstract record available.
Inventors
- 👤 William F Dietrichson
- 👤 Christiansen John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:38
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/20; B61G9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1126663A
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US1563091A
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US2122159A
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US2143216A
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US2123441A
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US2222480A
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US2242727A
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US2309024A
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US2352718A
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US2355524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |