Patent US2565264A successfully refreshed from Google Patents.
US2565264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardenable alloy steels resistant to softening at elevated temperatures
Assignee: Crucible Steel Company of America
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Filing: 1950-02-17
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Granted: 1951-08-21
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Expires: 1970-02-17
Abstract
No abstract record available.
Inventors
- 👤 Payson Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:09
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
AN ALLOY STEEL OF RELATIVELY LOW ALLOY CONTENT WHICH IS HARDENABLE BY QUENCHING FROM AN AUSTENITIZING TEMPERATURE, AND WHICH UNDERGOES SECONDARY HARDENING ON SUBSEQUENT TEMPERING AT ABOUT 1100* F., AND WHICH IS OF A BLANCED COMPOSITION SUCH AS TO IMPART TO SAID STEEL IN THE QUENCHED AND TEMPERED CONDITION, HIGH RESISTANCE AGAINST SOFTENING AT TEMPERATURES UPWARDS OF 1100* F., SAID STEEL CONTAINING ABOUT: 0.5 TO 3% CHROMIUM, 0.2 TO 2% VANADIUM, 1 TO 3% TUNGSTEN, 0.5 TO 4% MOLYBDENUM, 0.3 TO 1.2% CARBON, UP TO 3% IN AGGREGATE OF OTHER ELEMENTS WHICH DO NOT SUBSTANTIALLY IMPAIR SAID RESISTANCE OF THE STEEL AGAINST SOFTENING, AND THE BALANCE SUBSTANTIALLY ALL IRON, IN PROPORTIONS SUCH THAT THE SUM OF 1/10 OF THE CHROMIUM CONTENT, 10/100 OF THE VANADIUM CONTENT, 3/100 OF THE TUNGSTEN CONTENT AND 6/100 OF THE MOLYBDENUM CONTENT, SHALL TOTAL AT LEAST 0.3% BUT SHALL NOT EXCEED 0.15% PLUS THE CARBON CONTENT.
Claim 2
Dependent Claim
151 words
AN ALLOY STEEL OF RELATIVELY LOW ALLOY CONTENT WHICH IS HARDENABLE BY QUENCHING FROM AN AUSTENITIZING TEMPERATURE, AND WHICH UNDERGOES SECONDARY HARDENING ON SUBSEQUENT TEMPERING AT ABOUT 1100* F., AND WHICH IS OF A BLANCED COMPOSITION SUCH AS TO IMPART TO SAID STEEL IN THE QUENCHED AND TEMPERED CONDITION, HIGH RESISTANCE AGAINST SOFTENING AT TEMPERATURES UPWARDS OF 1100* F., SAID STEEL CONTAINING ABOUT: 0.5 TO 3% CHROMIUM, 0.2 TO 2% VANADIUM, 1 TO 3% TUNGSTEN, 0.5 TO 4% MOLYBDENUM, 0.3 TO 1.2% CARBON, UP TO 3% IN AGGREGATE OF OTHER ELEMENTS WHICH DO NOT SUBSTANTIALLY IMPAIR SAID RESISTANCE OF THE STEEL AGAINST SOFTENING, AND THE BALANCE SUBSTANTIALLY ALL IRON, IN PROPORTIONS SUCH THAT THE SUM OF 1/10 OF THE CHROMIUM CONTENT, 10/100 OF THE VANADIUM CONTENT, 3/100 OF THE TUNGSTEN CONTENT AND 6/100 OF THE MOLYBDENUM CONTENT, SHALL TOTAL AT LEAST 0.3% BUT SHALL NOT EXCEED 0.15% PLUS THE CARBON CONTENT.
References Cited (Backward Citations)
US2209623A
Cited
US1937334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |