Patent US2844500A successfully refreshed from Google Patents.
US2844500A
Expired / Lapsed
US
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Method for heat treating bearings and product thereof
Assignee: Renault SA
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Filing: 1956-07-25
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Granted: 1958-07-22
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Peras Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:08
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/36; F; F16; F16C; F16C33/00; F16C33/30; F16C33/58; F16C33/62; F16C2204/00; F16C2204/60; F16C2204/66; F16C2300/00; F16C2300/40; F16C2300/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS OF TREATING BEARINGS CONSISTING ESSENTIALLY OF 0.8 TO 1.3 PERCENT CARBON, 0.8 TO 2.0 PERCENT SILICON, 0.2 TO 0.8 PERCENT MANGANESE, 0 TO 3 PERCENT CHROMIUM, 0 TO 2.5 PERCENT MOLYBDENUM AND THE REMAINDER SUBSTANTIALLY IRON WHICH COMPRISES HEATING SAID BEARINGS TO A TEMPERATURE OF FROM 50 TO 80*C. ABOVE THE EUTECTOID TRANSFORMED TEMPERATURE, QUENCHING SAID BEARINGS AT A TEMPERATURE FROM 180 TO 250*C. AND COOLING SAID BEARINGS AT A TEMPERATURE BELOW -20*C.
Claim 2
Dependent Claim
75 words
A PROCESS OF TREATING BEARINGS CONSISTING ESSENTIALLY OF 0.8 TO 1.3 PERCENT CARBON, 0.8 TO 2.0 PERCENT SILICON, 0.2 TO 0.8 PERCENT MANGANESE, 0 TO 3 PERCENT CHROMIUM, 0 TO 2.5 PERCENT MOLYBDENUM AND THE REMAINDER SUBSTANTIALLY IRON WHICH COMPRISES HEATING SAID BEARINGS TO A TEMPERATURE OF FROM 50 TO 80*C. ABOVE THE EUTECTOID TRANSFORMED TEMPERATURE, QUENCHING SAID BEARINGS AT A TEMPERATURE FROM 180 TO 250*C. AND COOLING SAID BEARINGS AT A TEMPERATURE BELOW -20*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |