US2923581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad journal bearing
Assignee: Clevite Corp
•
Filing: 1957-05-08
•
Granted: 1960-02-02
•
Expires: 1977-05-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Wahrenberger
- 👤 Ronald R Mattingly
- 👤 William A Weinkamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
B; B61; B61F; B61F15/00; B61F15/20; B61F15/22; B61F17/00; B61F17/02; B61F17/14; B61F17/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US797129A
Cited
US1245586A
Cited
US1327429A
Cited
US2720431A
Cited
US2718438A
Cited
FR1081818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |