US2553583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring suspension for railroad cars
Assignee: Hickman Pneumatic Seat Co Inc
•
Filing: 1945-09-27
•
Granted: 1951-05-22
•
Expires: 1965-09-27
Abstract
No abstract record available.
Inventors
- 👤 Albert F Hickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:16
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/26; B61F5/30; B61F5/301; B61F5/304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US173257A
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US2371169A
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US1179060A
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US1414737A
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US1742825A
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US2056220A
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US2166769A
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US2277978A
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US2377883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |