US2561945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-strength nonmagnetic steels
Assignee: Crucible Steel Company of America
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Filing: 1949-10-08
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Granted: 1951-07-24
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Expires: 1969-10-08
Abstract
No abstract record available.
Inventors
- 👤 Payson Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:35
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A FORGEABLE AND MACHINEABLE, AGE-HARDENABLE, AUSTENITIC ALLOY STEEL WHICH, ON SOLUTIONTEATING AT ABOUT 2100* TO 2300* F., FOLLOWED BY AGING AT ABOUT 1200* TO 1300* F., IS CHARACTERIZED IN BEING SUBSTANTIALLY NON-MAGNETIC AND IN HAVING A HARDNESS IN EXCESS OF ROCKWELL "C" 35 AND AN 0.02% YIELD STRENGTH OF AT LEAST 85,000 POUNDS PER SQUARE INCH, SAID STEEL CONTAINING: ABOUT 19 TO 25% NICKEL; ABOUT 2 TO 6% MANGANESE; ABOUT 5 TO 14% CHROMIUM; ABOUT 3 TO 5% ALUMINUM; FROM AN EFFECTIVE AMOUNT UP TO ABOUT 3% SILICON; FROM AN EFFECTIVE AMOUNT UP TO BON; UP TO ABOUT 3% IN AGGREGATE OF OTHER ELEMENTS WHICH DO NOT SUBSTANTIALLY IMPAIR THE AGE-HARDENING AND NON-MAGNETIC PROPERTIES OF THE STEEL; AND THE BALANCE SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
123 words
A FORGEABLE AND MACHINEABLE, AGE-HARDENABLE, AUSTENITIC ALLOY STEEL WHICH, ON SOLUTIONTEATING AT ABOUT 2100* TO 2300* F., FOLLOWED BY AGING AT ABOUT 1200* TO 1300* F., IS CHARACTERIZED IN BEING SUBSTANTIALLY NON-MAGNETIC AND IN HAVING A HARDNESS IN EXCESS OF ROCKWELL "C" 35 AND AN 0.02% YIELD STRENGTH OF AT LEAST 85,000 POUNDS PER SQUARE INCH, SAID STEEL CONTAINING: ABOUT 19 TO 25% NICKEL; ABOUT 2 TO 6% MANGANESE; ABOUT 5 TO 14% CHROMIUM; ABOUT 3 TO 5% ALUMINUM; FROM AN EFFECTIVE AMOUNT UP TO ABOUT 3% SILICON; FROM AN EFFECTIVE AMOUNT UP TO BON; UP TO ABOUT 3% IN AGGREGATE OF OTHER ELEMENTS WHICH DO NOT SUBSTANTIALLY IMPAIR THE AGE-HARDENING AND NON-MAGNETIC PROPERTIES OF THE STEEL; AND THE BALANCE SUBSTANTIALLY ALL IRON.
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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |