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Patent US3752709A successfully refreshed from Google Patents.
US3752709A
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Corrosion resistant metastable austenitic steel
Assignee: United States Atomic Energy Commission
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Filing: 1970-10-12
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Granted: 1973-08-14
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Expires: 1990-10-12
Abstract
Abstract A STEEL AND A PROCESS FOR IMPARTING TO SUCH STEEL A COMBINATION OF HIGH STRENGTH, HIGH UNIFORM ELONGATION, HIGH TOUGHNESS AND CORROSION RESISTANCE. THE PROCESS CONSISTS OF SUBJECTING SINGLE PHASE, AUSTENITIC STEEL WHICH HAS AN MS BELOW AMBIENT TEMPERATURE, A TOTAL CARBON PLUS NITROGEN CONTENT OF FROM ABOUT 0.15% TO ABOUT 0.5%, A CHROMIUM CONTENT OF FROM ABOUT 11% TO ABOUT 18%, AND AT LEAST 0.5% OF AT LEAST ONE ALLOYING ELEMENT SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, MANGANESE, VANADIUM, NIOBIUM, TANTALUM AND TUNGSTEN PREFERABLY MOLYBDENUM, TO DEFORMATION AT A TEMPERATURE ABOVE ABOUT 400*F. BUT BELOW THE RECRYSTALLIZATION TEMPERATURE OF THE STEEL.
Inventors
- 👤 V Zackay
- 👤 E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:46
CPC Classifications
C; C21; C21D; C21D8/00; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |