Patent US3358615A successfully refreshed from Google Patents.
US3358615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equalizing spring bolster for railroad cars
Assignee: Standard Car Truck Co
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Filing: 1965-07-28
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Granted: 1967-12-19
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Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 Ray C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:46
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A RAILROAD CAR TRUCK, HAVING SPACED, PARALLEL SIDE FRAMES, A LEVER PIVOTED ON EACH SIDE FRAME, EXTENDING INWARDLY ACROSS THE TRUCK TOWARD THE OTHER SIDE FRAME, EACH LEVER BEING, FREE AND INDEPENDENT OF THE OTHER LEVER, TO ROTATE ABOUT ITS OWN PIVOT AXIS, YIELDING LOAD CARRYING MEANS INTERPOSED BETWEEN THE FREE END OF EACH LEVER AND THE ADJACENT SIDE FRAME, LOAD CARRYING ASSEMBLIES ON EACH LEVER ADJACENT THE SPRING SUPPORTED END THEREOF.
Claim 2
Dependent Claim
72 words
A RAILROAD CAR TRUCK, HAVING SPACED, PARALLEL SIDE FRAMES, A LEVER PIVOTED ON EACH SIDE FRAME, EXTENDING INWARDLY ACROSS THE TRUCK TOWARD THE OTHER SIDE FRAME, EACH LEVER BEING, FREE AND INDEPENDENT OF THE OTHER LEVER, TO ROTATE ABOUT ITS OWN PIVOT AXIS, YIELDING LOAD CARRYING MEANS INTERPOSED BETWEEN THE FREE END OF EACH LEVER AND THE ADJACENT SIDE FRAME, LOAD CARRYING ASSEMBLIES ON EACH LEVER ADJACENT THE SPRING SUPPORTED END THEREOF.
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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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |