US3262823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maraging steel
Assignee: Huntington Alloys Corp
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Filing: 1963-06-07
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Granted: 1966-07-26
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 Edward P Sadowski
- 👤 Raymond F Decker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:37
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44; C22C38/54
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A PROCESS OF HEAT TREATING MARAGING STEEL CONTAINING ABOUT 9.5% TO ABOUT 13.5% NICKEL, ABOUT 2.5% TO 5.5% CHROMIUM, ABOUT 1.9% TO ABOUT 4.2% MOLYBDENUM,, ABOUT 0.05% TO ABOUT 0.4% ALIMINUM AND LESS THAN ABOUT 0.03% RCARBON, COMPRISING SUBJECTING SAID STEEL TO A FIRST MARTENSITIC TRANSFORMATIION, ANNEALING SAID STEEL TO CONVERT THE THUS-FORMED MARTENSITE TO AUSTENITE, COOLING THE ANNEALED STEEL TOEFFECT A SECOND TRANSFORMATION TO MARTENSITE AND THEREAFTER AGING THE THUS-TREATED MARTENSITIC STEEL AT ABOUT 800*F. TO ABOUT 1000*F. FOR ABOUT 1 TO ABOUT 10 HOURS.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |