US2798805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrought railroad wheels made of alloy steels
Assignee: United States Steel Corp
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Filing: 1954-09-03
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Granted: 1957-07-09
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Expires: 1974-09-03
Abstract
No abstract record available.
Inventors
- 👤 John M Hodge
- 👤 Joseph M Wandrisco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:38
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A WROUGHT STEEL RAILWAY WHEEL HAVING AN ELEVATED TEMPERATURE YIELD STRENGTH IN EXCESS OF 60,000 P.S.I. AT 1000* F. IN THE RIM PORTION WHRN HEAT TREATED TO A HARDNESS IN EXCESS OF 250 BHN AND HAVING A ROOM TEMPERATURE FATIGUE STRENGTH IN THE PLATE PORTION IN EXCESS OF 60,000 P.S.I. WHEN HEAT TREATED TO A HARDNESS VALUE IN EXCESS OF 220 BHN, SAID WHEEL BEING CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM THERMAL CHECKING AND CRACKING UNDER SEVERE BRAKING CONDITIONS, THE STEEL OF SAID WHEEL CONTAINING
References Cited (Backward Citations)
US2586042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |