Patent US3594714A successfully refreshed from Google Patents.
US1997193A
Expired / Lapsed
US
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Permanent magnet and method of manufacturing same
Assignee: Mitsubishi Electric Corp
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Filing: 1932-06-16
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Granted: 1935-04-09
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Expires: 1952-06-16
Abstract
No abstract record available.
Inventors
- 👤 Kato Yogoro
- 👤 Takei Takeshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2666; H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/021; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
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) | 1938-04-08 | 1938-10-08 | 1939-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-08 | 1942-10-08 | 1943-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-08 | 1946-10-08 | 1947-04-09 | $7700.00 | Window Closed / Lapsed |