US2499861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnets and alloys therefor
Assignee: Crucible Steel Company of America
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Filing: 1948-03-16
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Granted: 1950-03-07
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Expires: 1968-03-16
Abstract
No abstract record available.
Inventors
- 👤 John R Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:07
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A FERROUS ALLOY ADAPTED FOR USE IN PERMANENT MAGNETS, CONTAINING: FROM ABOUT 10% UP TO NOT MORE THAN 20% NICKEL; ABOUT 16 TO 30 COBALT; ABOUT 6 TO 11% ALUMINUM; UP TO ABOUT 7% OF COPPER; UP TO ABOUT 1% MANGANESE; UP TO ABOUT 0.1% CARBON; UP TO ABOUT 5% TITANIUM; FROM ABOUT 0.15 TO 5% OF METAL SELECTED FROM THE GROUP CONSISTING OF THE FOLLOWING, (A) ZIRCONIUM, AND (B) ZIRCONIUM AND SILICON; AND THE BALANCE SUBSTANTIALLY ALL IRON, THE METAL OF SAID GROUP BEING PRESENT IN AMOUNT SUCH AS TO IMPART TO SAID ALLOY A SUBSTANTIALLY SINGLE-PHASE MICROSTRUCTURE ON HEATING AT ABOUT 1600* TO 1700*F. AND COOLING THEREFROM.
Claim 2
Dependent Claim
109 words
A FERROUS ALLOY ADAPTED FOR USE IN PERMANENT MAGNETS, CONTAINING: FROM ABOUT 10% UP TO NOT MORE THAN 20% NICKEL; ABOUT 16 TO 30 COBALT; ABOUT 6 TO 11% ALUMINUM; UP TO ABOUT 7% OF COPPER; UP TO ABOUT 1% MANGANESE; UP TO ABOUT 0.1% CARBON; UP TO ABOUT 5% TITANIUM; FROM ABOUT 0.15 TO 5% OF METAL SELECTED FROM THE GROUP CONSISTING OF THE FOLLOWING, (A) ZIRCONIUM, AND (B) ZIRCONIUM AND SILICON; AND THE BALANCE SUBSTANTIALLY ALL IRON, THE METAL OF SAID GROUP BEING PRESENT IN AMOUNT SUCH AS TO IMPART TO SAID ALLOY A SUBSTANTIALLY SINGLE-PHASE MICROSTRUCTURE ON HEATING AT ABOUT 1600* TO 1700*F. AND COOLING THEREFROM.
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) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |