Patent US3039966A successfully refreshed from Google Patents.
US3039966A
Expired / Lapsed
US
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Square loop ferromagnetic material
Assignee: US Philips Corp
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Filing: 1959-06-17
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Granted: 1962-06-19
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Expires: 1979-06-17
Abstract
No abstract record available.
Inventors
- 👤 Frank G Brockman
- 👤 Paul W Beck
- 👤 Kenneth E Matteson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:18
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A FERROMAGNETIC FERRITE HAVING A SUBSTANTIALLY SQUARE HYSTERESIS LOOP CONSISTING ESSENTIALLY OF THE REACTION PRODUCT FORMED BY HEATING ABOUT 10 TO 48.5 MOL. PERCENT OF NIO, ABOUT 1.5 TO 32.5 MOL. PERCENT ZNO, ABOUT 0.2 TO 7.0 MOL. PERCENT OF COO, ABOUT 0.2 TO 7.5 MOL. PERCENT OF CUO, AND ABOUT 47.5 TO 49.8 MOL. PERCENT OF FERRIC OXIDE FOR ABOUT 2 TO 10 HOURS AT 1000*C. TO 1300*C. UNDER NON-REDUCING CONDITIONS, SAID FERRITE HAVING A COERCIVE FORCE OF LESS THAN ABOUT 5 OERSTED AND AN AO.61 OF AT LEAST 0.5.
Claim 2
Dependent Claim
91 words
A FERROMAGNETIC FERRITE HAVING A SUBSTANTIALLY SQUARE HYSTERESIS LOOP CONSISTING ESSENTIALLY OF THE REACTION PRODUCT FORMED BY HEATING ABOUT 10 TO 48.5 MOL. PERCENT OF NIO, ABOUT 1.5 TO 32.5 MOL. PERCENT ZNO, ABOUT 0.2 TO 7.0 MOL. PERCENT OF COO, ABOUT 0.2 TO 7.5 MOL. PERCENT OF CUO, AND ABOUT 47.5 TO 49.8 MOL. PERCENT OF FERRIC OXIDE FOR ABOUT 2 TO 10 HOURS AT 1000*C. TO 1300*C. UNDER NON-REDUCING CONDITIONS, SAID FERRITE HAVING A COERCIVE FORCE OF LESS THAN ABOUT 5 OERSTED AND AN AO.61 OF AT LEAST 0.5.
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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) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |