US2499862A
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
2026-10-24 22:37
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/78; C22; C22C; C22C38/00; C22C38/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A FERROUS ALLOY ADAPTED FOR USE INPERMANENT MAGNETS, CONTAINING: ABOUT 7 TO 20% ALUMINUM; ABOUT 5 TO 40% NICKEL; FROM ABOUT 0.5 TO UNDER 16% COBALT; UP TO ABOUT 10% EACH OF MOLYBDENUM, MANGANESE AND VANADIUM; UP TO ABOUT 8% TUNGSTEN; UP TO ABOUT 5% EACH OF CHROMIUM AND SILICON; UP TO ABOUT 16% COPPER; ABOUT 0.25 TO 5% EACH OF ZIRCONIUM AND TITANIUM; UP TO ABOUT 0.1% CARBON; AND THE REMAINDER IRON.
Claim 2
Dependent Claim
73 words
A FERROUS ALLOY ADAPTED FOR USE INPERMANENT MAGNETS, CONTAINING: ABOUT 7 TO 20% ALUMINUM; ABOUT 5 TO 40% NICKEL; FROM ABOUT 0.5 TO UNDER 16% COBALT; UP TO ABOUT 10% EACH OF MOLYBDENUM, MANGANESE AND VANADIUM; UP TO ABOUT 8% TUNGSTEN; UP TO ABOUT 5% EACH OF CHROMIUM AND SILICON; UP TO ABOUT 16% COPPER; ABOUT 0.25 TO 5% EACH OF ZIRCONIUM AND TITANIUM; UP TO ABOUT 0.1% CARBON; AND THE REMAINDER 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) | 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 |