Patent US2444637A successfully refreshed from Google Patents.
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 18:43
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/20; B61G9/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1126663A
Cited
US1563091A
Cited
US2122159A
Cited
US2143216A
Cited
US2123441A
Cited
US2222480A
Cited
US2242727A
Cited
US2309024A
Cited
US2352718A
Cited
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 |