Patent US2712796A successfully refreshed from Google Patents.
US2712796A
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US
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Car truck damping device
Assignee: National Malleable and Steel Castings Co
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Filing: 1949-11-18
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Granted: 1955-07-12
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Expires: 1969-11-18
Abstract
No abstract record available.
Inventors
- 👤 James A Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:30
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)
US2222478A
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US2403045A
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US2394547A
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US2434583A
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US2481475A
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US2545591A
Cited
US2458210A
Cited
US2512829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |