US3554618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad trucks
Assignee: Polymer Corp
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Filing: 1969-01-06
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Granted: 1971-01-12
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Expires: 1989-01-06
Abstract
Abstract IN A RAILROAD VEHICLE, A NYLON WEAR PLATE OR LINER IS USED AS A BEARING SURFACE IN PLACE OF A CONVENTIONAL METALLIC WEAR LINER. THE BEARING SURFACE IS POSITIONED AT THE POINT WHERE THE TRUCK WHEELS AND THE VEHICLE BODY MOVE RELATIVE TO EACH OTHER IN A GENERALLY VERTICAL DIREC- TION. A PEDESTAL LEG WEAR LINER HAVING A FLAT NYLON WEAR PLATE IS DISCLOSED.
Inventors
- 👤 James A Ditzler
- 👤 Donald D Carswell Jr
- 👤 Kenneth E Reisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:14
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/26; B61F5/30; B61F5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |