US2814563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature alloys
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1955-07-27
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Granted: 1957-11-26
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Expires: 1975-07-27
Abstract
No abstract record available.
Inventors
- 👤 Wasil W Dyrkacz
- 👤 Edward E Reynolds
- 👤 Richard R Macfarlane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:51
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/04; C22C38/18; C22C38/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN AGE HARDENABLE AUSTENITIC IRON BASE ALLOY FOR USE AT HIGH STRESS LEVELS AND AT TEMPERATURES OF UP TO 1600*F. AND CONSISTING ESSENTIALLY OF FROM ABOUT 0.20%% TO ABOUT 0.40% CARBON, FROM ABOUT 16.0% TO ABOUT 20.0% MANGANESE, FROM ABOUT 0.15% TO ABOUT 0.75% SILICON, FROM ABOUT 11.5% TO ABOUT 13.5% CHROMIUM, FROM ABOUT 2.0% TO ABOUT 4.0% MOLYBDENUM, FROM ABOUT 0.60% TO ABOUT 0.95% VANADIUM, FROM ABOUT 0.10% TO ABOUT 0.25% NITROGEN, AND FROM ABOUT 0.10% TO ABOUT 0.40% BORON, THE ALLOY BEING CHARACTERIZED BY HAVING A RATIO OF NOTCH BAR RUPTURE LIFE TO SMOOTH BAR RUPTURE LIFE OF GREATER THAN 1.
Claim 2
Dependent Claim
103 words
AN AGE HARDENABLE AUSTENITIC IRON BASE ALLOY FOR USE AT HIGH STRESS LEVELS AND AT TEMPERATURES OF UP TO 1600*F. AND CONSISTING ESSENTIALLY OF FROM ABOUT 0.20%% TO ABOUT 0.40% CARBON, FROM ABOUT 16.0% TO ABOUT 20.0% MANGANESE, FROM ABOUT 0.15% TO ABOUT 0.75% SILICON, FROM ABOUT 11.5% TO ABOUT 13.5% CHROMIUM, FROM ABOUT 2.0% TO ABOUT 4.0% MOLYBDENUM, FROM ABOUT 0.60% TO ABOUT 0.95% VANADIUM, FROM ABOUT 0.10% TO ABOUT 0.25% NITROGEN, AND FROM ABOUT 0.10% TO ABOUT 0.40% BORON, THE ALLOY BEING CHARACTERIZED BY HAVING A RATIO OF NOTCH BAR RUPTURE LIFE TO SMOOTH BAR RUPTURE LIFE OF GREATER THAN 1.
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) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |