US3131056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling contact bearing steels and process for heat treating the same
Assignee: Huntington Alloys Corp
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Filing: 1962-04-20
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Granted: 1964-04-28
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Damian V Gullotti
- 👤 John L Hurley
- 👤 Herschel V Beasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:10
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A ROLLING CONTACT BEARING STEEL HAVING HIGH HARDENABILITY, A SURFACE HARDNESS OF AT LEAST RC62, THE ABILITY TO OIL QUENCH TO SUCH HARDNESS, GOOD RESISTANCE TO SOFTENING AND CONSISTING OF 0.6% TO ABOUT 0.8% CARBON, 0.3% TO 0.8% MANGANESE, SILICON IN AN AMOUNT UP TO 0.5%, 0.5% TO 1.5% NICKEL, 0.1% TO 0.45% CHROMIUM, 0.05% TO 0.35% MOLYBDENUM, ALUMINUM UP TO 0.5% AND THE BALANCE ESSENTIALLY IRON, SAID ALLOY STEEL BEING FURTHER CHARACTERIZED BY A SPHEROIDIZED CARBIDE MICROSTRUCTURE WHEN
References Cited (Backward Citations)
US1660790A
Cited
US2938820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |