US2902947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway draft sill and body bolster structure
Assignee: General Steel Castings Corp
•
Filing: 1955-07-20
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Granted: 1959-09-08
•
Expires: 1975-07-20
Abstract
No abstract record available.
Inventors
- 👤 Richard L Lich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:09
CPC Classifications
B; B61; B61F; B61F1/00; B61F1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1650407A
Cited
US2010024A
Cited
US2048330A
Cited
US2114819A
Cited
US2185976A
Cited
US2226091A
Cited
US2781919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |