US2519627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphitic steel of controllable hardenability and article made therefrom
Assignee: Timken Co
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Filing: 1948-03-20
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Granted: 1950-08-22
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Expires: 1968-03-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Bonte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:21
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
134 words
ALLOY STEEL OF CONTROLLABLE HARDENABILITY CONSISTING ESSENTIALLY OF ABOUT 1 TO 2 PER CENT OF CARBON, ABOUT 0.25 TO 1 PER CENT OF CHROMIUM, ABOUT 0.5 TO 1.5 PER CENT OF MANGANESE, ABOUT 0.2 TO 1 PER CENT OF MOLYBDENUM, ABOUT 0.25 TO 1.4 PER CENT OF NICKEL, ABOUT 0.75 TO 2 PER CENT OF SILICON, AND THE REMAINDER IRON, AND CHARACTERIZED BY CAPABILITY OF BEING HOT WORKED AND OF PRODUCING UPON HEAT TREATMENT AUSTENITIC-MARTENSITIC STRUCTURES CONTAINING GRAPHITIC CARBON AND SPHEROIDIZED CARBIDE DISPERSED FINELY THROUGH THE STRUCTURE, AND OF HIGH RESISTANCE TO WEAR, AND BY BEING DEEPLY HARDENING WHEN SAID ELEMENTS, OTHER THAN CARBON, ARE TOWARD THE UPPER LIMIT OF THE RANGES STATED, AND BY BEING SHALLOW HARDENING WHEN THE SAID ELEMENTS, OTHER THAN CARBON, ARE TOWARD THE LOWER LIMITS OF THE RANGES STATED.
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) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |