US3615915A
Expired / Lapsed
US
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Method of densifying magnetically anisotropic powders
Assignee: US Philips Corp
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Filing: 1969-10-28
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Granted: 1971-10-26
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Expires: 1989-10-28
Abstract
Abstract A method of densifying magnetically anisotropic powders under a magnetic field by the use of isostatic pressures of at least 10 kb.
Inventors
- 👤 Willem Luiten
- 👤 Frans Frederik Westendorp
- 👤 Gijsbertus Maria Arnoldus Kort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:18
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; B; B22; B22F; B22F3/00; B22F3/02; B22F3/04; H01F41/00; H01F41/02; H01F41/0253; H01F41/0273
Claims Analysis
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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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |