US2720431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Journal bearing
Assignee: CHESAPEAKE AND OHIO RAILWAY Co
•
Filing: 1952-03-27
•
Granted: 1955-10-11
•
Expires: 1972-03-27
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Browne
- 👤 Sergei G Guins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:24
CPC Classifications
B; B61; B61F; B61F17/00; B61F17/02; B61F17/14; B61F17/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1701010A
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GB209265A
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US1578106A
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US1741538A
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GB461985A
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DE657692C
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US2294105A
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US2438214A
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US2610097A
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US2670998A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |