Patent US3434892A successfully refreshed from Google Patents.
US3434892A
Expired / Lapsed
US
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Directionally solidified permanent magnet alloys with aligned ferro-magnetic whiskers
Assignee: Magnetfabrik Bonn GmbH
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Filing: 1965-10-21
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Granted: 1969-03-25
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Gunther Heimke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:37
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; C; C22; C22C; C22C14/00; C22C16/00; C22C19/00; C22C19/07; C22C27/00; C22C27/02; C22C28/00; C30; C30B; C30B21/00; C30B21/02
Claims Analysis
Total Claims: 0
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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) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |