US3012523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic suspension for use on freight car trucks
Assignee: American Steel Foundries
•
Filing: 1959-10-23
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Granted: 1961-12-12
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Expires: 1979-10-23
Abstract
No abstract record available.
Inventors
- 👤 Fred E Bachman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:07
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/052; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1008290A
Cited
US2180492A
Cited
US2288383A
Cited
US2670201A
Cited
US2633811A
Cited
US2691420A
Cited
US2758549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |