US2435385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction damped railway truck
Assignee: Symington Gould Co
•
Filing: 1944-10-09
•
Granted: 1948-02-03
•
Expires: 1964-10-09
Abstract
No abstract record available.
Inventors
- 👤 Glenn F Couch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:41
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1293810A
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US994501A
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US1631079A
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US2053990A
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US2009770A
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US1894386A
Cited
US2333921A
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US2348453A
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US2346614A
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US2346860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-02 | 1951-08-04 | 1952-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-02 | 1955-08-04 | 1956-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-02 | 1959-08-04 | 1960-02-03 | $7700.00 | Window Closed / Lapsed |