US2876152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Case carburized high temperature bearing members
Assignee: Timken Co
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Filing: 1958-02-26
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Granted: 1959-03-03
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Expires: 1978-02-26
Abstract
No abstract record available.
Inventors
- 👤 Chester F Jatczak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:33
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/22; C23; C23C; C23C8/00; Y; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S148/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
AS A NEW ARTICLE OF MANUFACTURE,A CASE CARBURIZED STEEL BEARING MEMBER FORMED FROM STEEL CONTAINING ABOUT 0.16 TO 0.21 PERCENT OF CARBON, ABOUT 1.25 TO 1.65 PERCENT OF CHROMIUM, AND ABOUT 0.50 TO 0.70 PERCENT OF MANGANESE, ABOUT 0.90 TO 1.10 PERCENT OF MOLYBDENUM, ABOUT 0.90 TO 1.25 PERCENT OF SILICON, AND THE REMAINDER IRON TOGETHER WITH IMPURITIES AND ELEMENTS IN AMOUNTS NOT ADVERSELY AFFECTING PROPERTIES OF THE BEARING MEMBER AND CHARACTERIZED AFTER HARDENING FROM 1525* F. BY CASE HARDNESS OF AT LEAST ABOUT 52 ROCKWELL "C" AT 600* F., AND BY A RECOVERED HARDNESS AFTER HEATING AT 600* F. FOR 500 HOURS OF ABOUT 60 ROCKWELL "C."
Claim 2
Dependent Claim
108 words
AS A NEW ARTICLE OF MANUFACTURE,A CASE CARBURIZED STEEL BEARING MEMBER FORMED FROM STEEL CONTAINING ABOUT 0.16 TO 0.21 PERCENT OF CARBON, ABOUT 1.25 TO 1.65 PERCENT OF CHROMIUM, AND ABOUT 0.50 TO 0.70 PERCENT OF MANGANESE, ABOUT 0.90 TO 1.10 PERCENT OF MOLYBDENUM, ABOUT 0.90 TO 1.25 PERCENT OF SILICON, AND THE REMAINDER IRON TOGETHER WITH IMPURITIES AND ELEMENTS IN AMOUNTS NOT ADVERSELY AFFECTING PROPERTIES OF THE BEARING MEMBER AND CHARACTERIZED AFTER HARDENING FROM 1525* F. BY CASE HARDNESS OF AT LEAST ABOUT 52 ROCKWELL "C" AT 600* F., AND BY A RECOVERED HARDNESS AFTER HEATING AT 600* F. FOR 500 HOURS OF ABOUT 60 ROCKWELL "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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |