Patent US3072575A successfully refreshed from Google Patents.
US3072575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic body and method of making the same
Assignee: US Philips Corp
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Filing: 1958-05-12
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Granted: 1963-01-08
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Expires: 1978-05-12
Abstract
No abstract record available.
Inventors
- 👤 Gorter Evert Willem
- 👤 Lotgering Frederik Karel
- 👤 Jonker Gerard Heinrich
- 👤 Wijn Henricus Petrus Johannes
- 👤 Kooy Cornelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:46
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2633
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD OF MANUFACTURING A SOFT MAGNETICALLY ANISOTROPIC FERROMAGNETIC BODY COMPRISING THE STEPS, FORMING IN FINELY-DIVIDED FROM A MIXTURE OF OXIDIC COMPONENTS FORMING UPON SINTERING A FERROMAGNETIC BODY HAVING A COMPOSITION CORRESPONDING TO ABOUT 8-21 MOL PERCENT OF AO, ABOUT 5-21 MOL PERCENT OF MEO, AND ABOUT 58-83 MOL PERCENT OF FE2O3, A BEING A BIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF BARIUM, STRONTIUM, LEAD AND CALCIUM, AND ME BEING A BIVALENT ION SELECTED FROM THE GROUP CONSISTING OF FE++, MN++, CO++, NI++, ZN++, MG++, CU++, AND
Claim 2
Independent Claim
88 words
A METHOD OF MANUFACTURING A SOFT MAGNETICALLY ANISOTROPIC FERROMAGNETIC BODY COMPRISING THE STEPS, FORMING IN FINELY-DIVIDED FROM A MIXTURE OF OXIDIC COMPONENTS FORMING UPON SINTERING A FERROMAGNETIC BODY HAVING A COMPOSITION CORRESPONDING TO ABOUT 8-21 MOL PERCENT OF AO, ABOUT 5-21 MOL PERCENT OF MEO, AND ABOUT 58-83 MOL PERCENT OF FE2O3, A BEING A BIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF BARIUM, STRONTIUM, LEAD AND CALCIUM, AND ME BEING A BIVALENT ION SELECTED FROM THE GROUP CONSISTING OF FE++, MN++, CO++, NI++, ZN++, MG++, CU++, AND
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |