US3031407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing ferrite bodies
Assignee: International Business Machines Corp
•
Filing: 1959-03-24
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Granted: 1962-04-24
•
Expires: 1979-03-24
Abstract
No abstract record available.
Inventors
- 👤 Marco Henry A Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD OF PRODUCING A FERROSPINEL BODY OF THE RECTANGULAR HYSTERESIS LOOP TYPE WHICH IMPROVES THE SQUARENESS OF THE HYSTERESIS CHARACTERISTIC COMPRISING THE STEPS OF PREPARING AN INTIMATE MIXTURE OF METALLIC OXIDES INCLUDING FERRIC OXIDE AND AT LEAST ONE BIVALENT OXIDE, FORMING A MOLDED COMPRESSED BODY FROM SAID MIXTURE, THEN SOAKING SAID MOLDED BODY IN WATER AND THEREAFTER PLACING THE WET BODY IN A FURNACE AND SINTERING THE BODY AT A TEMPERATURE SUFFICIENT TO PRODUCE A FERROSPINEL BODY.
Claim 2
Independent Claim
78 words
A METHOD OF PRODUCING A FERROSPINEL BODY OF THE RECTANGULAR HYSTERESIS LOOP TYPE WHICH IMPROVES THE SQUARENESS OF THE HYSTERESIS CHARACTERISTIC COMPRISING THE STEPS OF PREPARING AN INTIMATE MIXTURE OF METALLIC OXIDES INCLUDING FERRIC OXIDE AND AT LEAST ONE BIVALENT OXIDE, FORMING A MOLDED COMPRESSED BODY FROM SAID MIXTURE, THEN SOAKING SAID MOLDED BODY IN WATER AND THEREAFTER PLACING THE WET BODY IN A FURNACE AND SINTERING THE BODY AT A TEMPERATURE SUFFICIENT TO PRODUCE A FERROSPINEL BODY.
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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) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |