US3673010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold-workable permanent magnet alloy
Assignee: Tohoku Special Steel Works Ltd
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Filing: 1970-05-19
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Granted: 1972-06-27
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Expires: 1990-05-19
Abstract
Abstract A PERMANENT MAGNET ALLOY MAINLY CONTAINING CO, NI, CR AND FE AND HAVING A REPLACEMENT RELATION BETWEEN CO AND NI OF CO WT. PERCENT=50-2.5(NI WT. PERCENT)-531.5(NI WT. PERCENT), WHICH CAN VERY EASILY BE SUBJECTED TO MECHANICAL WORKING AND COLD WORKING AND YET IS VERY CHEAP OWING TO THE PRESENCE OF LESS THAN 1% BY WEIGHT OF V CONTARY TO VICALLOY CONTAINING 10-14% BY WEIGHT OF V.
Inventors
- 👤 Jiro Matsumoto
- 👤 Masatoshi Takeuchi
- 👤 Arimichi Abe
- 👤 Koji Sengoku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:52
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/52
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |