Patent US2933200A successfully refreshed from Google Patents.
US2933200A
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US
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Combined rubber and friction shock absorbing mechanism for railway cars
Assignee: American Steel Foundries
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Filing: 1956-11-09
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Granted: 1960-04-19
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Expires: 1976-11-09
Abstract
No abstract record available.
Inventors
- 👤 Francis P Quinn
- 👤 Willis F Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:52
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/40; B; B61; B61G; B61G9/00; B61G9/04; B61G9/10; B61G9/12; B61G9/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |