US3226328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making lithium nickel ferrite having a substantially rectangular hysteresis loop
Assignee: US Philips Corp
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Filing: 1963-01-04
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Granted: 1965-12-28
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Expires: 1983-01-04
Abstract
No abstract record available.
Inventors
- 👤 Esveldt Cornelis Jacobus
- 👤 Peloschek Hans Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2616
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A METHOD OF MANUFACTURING A FERROMAGNETIC BODY HAVING A SUBSTANTIALLY RECTANGULAR HYSTEREIS LOOP COMPRISING THE SSTEPS, FORMING A FINELY-DIVIDED MIXTURE OF ABOUT 2 TO 20 MOL PERCENT OF LI2O, AND ABOUT 0.5 TO 45 MOL PERCENT NIO, ABOUT 50 TO 85 MOL PERCENT FE2O2, UP TO 3 MOL PERCENT OFZNO, AND UP TO 8 MOL PERCENT OF CUO, COMPACTING SAID MIXTURE INTO A BODY, HEATING SAID BODY TO A TEMPERATURE OF ABOUT 1200* TO 1400*C. IN AN ATMOSPHERE SUBSTANTIALLY FREE OF WATER-VAPOR CONTAINING AT LEAST AS MUCH OXYGEN BY VOLUME AS AIR, COOLING SAID BODY FROM SAID HEATING TEMPERATURE TO A TEMPERATURE OF ABOUT 100* TO 600*C. BELOW THE HEATING TEMPERATURE AT A RATE OF NOT MORE THAN 30*C. PER MINUTE, AND QUENCHING SAID BODY FROM THE TEMPERATURE TO WHICH IT WAS COOLED.
Claim 2
Independent Claim
133 words
A METHOD OF MANUFACTURING A FERROMAGNETIC BODY HAVING A SUBSTANTIALLY RECTANGULAR HYSTEREIS LOOP COMPRISING THE SSTEPS, FORMING A FINELY-DIVIDED MIXTURE OF ABOUT 2 TO 20 MOL PERCENT OF LI2O, AND ABOUT 0.5 TO 45 MOL PERCENT NIO, ABOUT 50 TO 85 MOL PERCENT FE2O2, UP TO 3 MOL PERCENT OFZNO, AND UP TO 8 MOL PERCENT OF CUO, COMPACTING SAID MIXTURE INTO A BODY, HEATING SAID BODY TO A TEMPERATURE OF ABOUT 1200* TO 1400*C. IN AN ATMOSPHERE SUBSTANTIALLY FREE OF WATER-VAPOR CONTAINING AT LEAST AS MUCH OXYGEN BY VOLUME AS AIR, COOLING SAID BODY FROM SAID HEATING TEMPERATURE TO A TEMPERATURE OF ABOUT 100* TO 600*C. BELOW THE HEATING TEMPERATURE AT A RATE OF NOT MORE THAN 30*C. PER MINUTE, AND QUENCHING SAID BODY FROM THE TEMPERATURE TO WHICH IT WAS COOLED.
Claim 3
Independent Claim
142 words
A METHOD OF MANUFACTURING A FERROMAGNETIC BODY HAVING A SUBSTANTIALLY RECTANGULAR HYTERSIS LOOP COMPRISING THE STEPS, FORMING A FINELY-DIVIDED MIXTURE OF ABOUT 2 TO 20 MOL PERCENT OF LI2O, ABOUT 0.5 TO 45 MOL PERCENT NIO, ABOUT 50 TO 85 MOL PERCENT FE2O3, UP TO 3 MOL PERCENT OF ZNO, AND UP TO 8 MOL PERCENT OF CUO, COMPACTING SAID MIXTURE INTO A BODY, HEATING SAID BODY TO A TEMPERATURE OF ABOUT 1200* TO 1400*C. IN AN ATMOSPHERE SUBSTANTIALLY FREE OF WATER-VAPOR CONTAINING AT LEAST AS MUCH OXYGEN BY VOLUME AS AIR, COOLING SAID BODY FROM SAID HEATING TEMPERATURE TO A TEMPERATURE WHICH IS 100* TO 600*C. LOWER THAN SAID HEATING TEMPERATURE AT A RATE WHICH IS GREATER THAN 30*C. PER MINUTE MAINTAINING SAID BODY AT SAID LATTER TEMPERATURE FOR AT LEAST FIVE MINUTES, AND QUENCHING SAID BODY FROM SAID LATTER TEMPERATURE.
Claim 4
Independent Claim
142 words
A METHOD OF MANUFACTURING A FERROMAGNETIC BODY HAVING A SUBSTANTIALLY RECTANGULAR HYTERSIS LOOP COMPRISING THE STEPS, FORMING A FINELY-DIVIDED MIXTURE OF ABOUT 2 TO 20 MOL PERCENT OF LI2O, ABOUT 0.5 TO 45 MOL PERCENT NIO, ABOUT 50 TO 85 MOL PERCENT FE2O3, UP TO 3 MOL PERCENT OF ZNO, AND UP TO 8 MOL PERCENT OF CUO, COMPACTING SAID MIXTURE INTO A BODY, HEATING SAID BODY TO A TEMPERATURE OF ABOUT 1200* TO 1400*C. IN AN ATMOSPHERE SUBSTANTIALLY FREE OF WATER-VAPOR CONTAINING AT LEAST AS MUCH OXYGEN BY VOLUME AS AIR, COOLING SAID BODY FROM SAID HEATING TEMPERATURE TO A TEMPERATURE WHICH IS 100* TO 600*C. LOWER THAN SAID HEATING TEMPERATURE AT A RATE WHICH IS GREATER THAN 30*C. PER MINUTE MAINTAINING SAID BODY AT SAID LATTER TEMPERATURE FOR AT LEAST FIVE MINUTES, AND QUENCHING SAID BODY FROM SAID LATTER TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |