US2564346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction wedge for railway car trucks
Assignee: Standard Car Truck Co
•
Filing: 1946-10-12
•
Granted: 1951-08-14
•
Expires: 1966-10-12
Abstract
No abstract record available.
Inventors
- 👤 Charles B Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:53
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)
US1907483A
Cited
US1844288A
Cited
US1893306A
Cited
US2142426A
Cited
US2338988A
Cited
US2346860A
Cited
US2366957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |