US3193503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic ceramic ferrites and method for making same
Assignee: OI Glass Inc
•
Filing: 1962-12-31
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Granted: 1965-07-06
•
Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 William E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2683
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A METHOD OF MANUFACTURING MAGNETIC CERAMIC FERRITES COMPRISING THE STEPS OF FORMING A HOMOGENEOUS MELT IN AN OXIDIZING ATMOSPHERE, SAID MELT CONTAINING 85-100 WEIGHT PERCENT OF A COMPOOSITION CONSISTING OF 16 TO 50 PERCENT MGO, 37 TO 60 PERCENT IRON OXIDE EXPRESSED AS FE3O4, AND 20 TO 45 PERCENT SIO2, COOLING THE COMPOSITION AND SUBJECTING THE COOLED HOMOGENEOUS MELT TO A TEMPERATURE SUFFICIENT TO INITIATE AND FOSTER DEVITRIFICATION OF THE COOLED MELT TO FORM A SEMICRYSSTALLING MAGNETIC CERAMIC BODY, THE REMAINING 15-0 WEIGHT PERCENT OF SAID MELT BEING OTHER COMPATIBLE MEMBERS SELECTED FROM THE GROUP CONSISTING OF INORGANIC OXIDES AND FLUORIDES AND MIXTURES THEREOF.
Claim 2
Independent Claim
104 words
A METHOD OF MANUFACTURING MAGNETIC CERAMIC FERRITES COMPRISING THE STEPS OF FORMING A HOMOGENEOUS MELT IN AN OXIDIZING ATMOSPHERE, SAID MELT CONTAINING 85-100 WEIGHT PERCENT OF A COMPOOSITION CONSISTING OF 16 TO 50 PERCENT MGO, 37 TO 60 PERCENT IRON OXIDE EXPRESSED AS FE3O4, AND 20 TO 45 PERCENT SIO2, COOLING THE COMPOSITION AND SUBJECTING THE COOLED HOMOGENEOUS MELT TO A TEMPERATURE SUFFICIENT TO INITIATE AND FOSTER DEVITRIFICATION OF THE COOLED MELT TO FORM A SEMICRYSSTALLING MAGNETIC CERAMIC BODY, THE REMAINING 15-0 WEIGHT PERCENT OF SAID MELT BEING OTHER COMPATIBLE MEMBERS SELECTED FROM THE GROUP CONSISTING OF INORGANIC OXIDES AND FLUORIDES AND MIXTURES THEREOF.
Claim 3
Dependent Claim
95 words
A SOLID MAGNETIC CERAMIC FERRITE BODY CONSISTING ESSENTIALLY OF A DEVITRIFIED MASS OF THE FORMULATION, BY WEIGHT, OF 85-100 PERCENT OF A COMPOSITION CONSISTING OF 16 TO 50 PERCENT MGO, 37 TO 60 PERCENT IRON OXIDE EXPRESSED AS FE3O4 AND 20 TO 45 PERCENT SIO2, THE REMAINING 15 TO 0 PERCENT OF SAID COMPOSITION BEING OTHER COMPATIBLE MEMBERS SELECTED FROM THE GROUP CONSISTING OF INORGANIC OXIDES AND FLUORIDES AND MIXTURES THEREOF, THE CRYSTALLINE MATERIAL FORMED BY SAID DEVITRIFICATION CONSTITUTING AT LEAST 50 VOLUME PERCENT OF SAID MASS AND BEING DISPERSED IN A RESIDUAL GLASSY MATRIX.
Claim 4
Dependent Claim
95 words
A SOLID MAGNETIC CERAMIC FERRITE BODY CONSISTING ESSENTIALLY OF A DEVITRIFIED MASS OF THE FORMULATION, BY WEIGHT, OF 85-100 PERCENT OF A COMPOSITION CONSISTING OF 16 TO 50 PERCENT MGO, 37 TO 60 PERCENT IRON OXIDE EXPRESSED AS FE3O4 AND 20 TO 45 PERCENT SIO2, THE REMAINING 15 TO 0 PERCENT OF SAID COMPOSITION BEING OTHER COMPATIBLE MEMBERS SELECTED FROM THE GROUP CONSISTING OF INORGANIC OXIDES AND FLUORIDES AND MIXTURES THEREOF, THE CRYSTALLINE MATERIAL FORMED BY SAID DEVITRIFICATION CONSTITUTING AT LEAST 50 VOLUME PERCENT OF SAID MASS AND BEING DISPERSED IN A RESIDUAL GLASSY MATRIX.
References Cited (Backward Citations)
US2920971A
Cited
US2934667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |