US2639985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing and steel therefor
Assignee: United States Steel Corp
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Filing: 1951-04-30
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Granted: 1953-05-26
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Expires: 1971-04-30
Abstract
No abstract record available.
Inventors
- 👤 Karl F Schauwecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:03
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/12; F16C33/121; F16C2204/00; F16C2204/60; F16C2204/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A BEARING STEEL CHARACTERIZED BY GOOD FORGEABILITY AND BY HUGH HARDENABILITY AND RETENTION OF HARDNESS AFTER QUENCHING FROM ABOVE ITS A-E1 POIINT AND THEREAFTER SUBJECTED TO PROLONGED HEATING AT 550. F., SAID STEEL CONTAINING FROM ABOUT .95 TO 1.15% CARBON, .25 TO .60% MANGANESE, .35% MAXIMUM NICKEL, 1.35 TO 1.65% CHROMIUM, .35% MAXIMUM COPPPER, .75 TO 1.25% AALUUMINUM PLUS SILICON, THE TOTAL OF ALUMINUUM PLUS SILICON BEING BETWEEN ABOUT 1.00 AND 1.75%, THE BALANCE BEING IRON AND RESIDUAL. AMOUNTS OF OTHER ELEMENTS.
Claim 2
Dependent Claim
82 words
A BEARING STEEL CHARACTERIZED BY GOOD FORGEABILITY AND BY HUGH HARDENABILITY AND RETENTION OF HARDNESS AFTER QUENCHING FROM ABOVE ITS A-E1 POIINT AND THEREAFTER SUBJECTED TO PROLONGED HEATING AT 550. F., SAID STEEL CONTAINING FROM ABOUT .95 TO 1.15% CARBON, .25 TO .60% MANGANESE, .35% MAXIMUM NICKEL, 1.35 TO 1.65% CHROMIUM, .35% MAXIMUM COPPPER, .75 TO 1.25% AALUUMINUM PLUS SILICON, THE TOTAL OF ALUMINUUM PLUS SILICON BEING BETWEEN ABOUT 1.00 AND 1.75%, THE BALANCE BEING IRON AND RESIDUAL. AMOUNTS OF OTHER ELEMENTS.
References Cited (Backward Citations)
US658823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |