US3564654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic pressing tool for anisotropic permanent magnets
Assignee: Magnetfabrik Bonn GmbH
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Filing: 1969-01-21
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Granted: 1971-02-23
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Expires: 1989-01-21
Abstract
Abstract AN AUTOMATIC PRESS FOR MAKING PERMANENT MAGNETS FROM MAGNET POWDER WHEREIN A MOLD HAS AN OPENING FOR RECEIVING THE MAGNET POWDER, A PRESS RAM FOR PRESSING THE MAGNET POWDER AND AN ELECTROMAGNET MEANS FOR ESTABLISHING A MAGNETIC FIELD WHILE THE MAGNET POWDER IS BEING PRESSED; THE MAGNET POWDER IS FED INTO THE MOLD OPENING BY MEANS OF A FILLING DEVICE CARRYING A QUANTITY OF THE MAGNET POWDER, AND A DEMAGNETIZING COIL OPERATIVELY CONNECTED TO THE FILLING DEVICE DEMAGNETIZES THE ADJACENT PARTS OF THE PRESSING TOOL AFTER EACH STOCK OF THE RAM.
Inventors
- 👤 Erich Steingroever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:48
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/008; H; H01; H01F; H01F13/00; H01F13/003; H01F13/006; H01F41/00; H01F41/02; H01F41/0253; H01F41/0273; Y; Y10; Y10S; Y10S264/00; Y10S264/58; Y10S425/00; Y10S425/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |