Patent US2915198A successfully refreshed from Google Patents.
US2915198A
Expired / Lapsed
US
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Railroad car cushioning mechanism
Assignee: Individual
•
Filing: 1955-04-13
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Granted: 1959-12-01
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Expires: 1975-04-13
Abstract
No abstract record available.
Inventors
- 👤 Oliver E Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:04
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/04; B61G9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2841293A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |