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US2656938A
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Friction buffer for railway cars
Assignee: W H MINER Inc
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Filing: 1949-10-22
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Granted: 1953-10-27
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Expires: 1969-10-22
Abstract
No abstract record available.
Inventors
- 👤 George E Dath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:06
CPC Classifications
B; B61; B61G; B61G11/00; B61G11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB366670A
Cited
GB394482A
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US2398083A
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US2430494A
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US2451569A
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US2429672A
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US2532013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |