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US3333333A
Expired / Lapsed
US
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Method of making magnetic material with pattern of embedded non-magnetic material
Assignee: RCA Corp
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Filing: 1963-08-14
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Granted: 1967-08-01
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Expires: 1983-08-14
Abstract
No abstract record available.
Inventors
- 👤 Robert L Noack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:01
CPC Classifications
H; H01; H01F; H01F3/00; H01F3/08; Y; Y10; Y10S; Y10S264/00; Y10S264/58; Y10S428/00; Y10S428/90; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T29/49075; Y10T29/49076; Y10T29/49078; Y10T29/4998; Y10T29/49982; Y10T29/49984
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
THE METHOD OF FORMING A SHEET OF UNIFORM HOMOGENEOUS SINTERED MAGNETIC FERRITE HAVING AN EMBEDDED PATTERN OF NON-MAGNETIC MATERIAL, COMPRISING THE STEPS OF DOCTOR BLADING A FERRITE SLURRY OVER A PLATE HAVING A RAISED PATTERN CORRESPONDING TO THE DESIRED EMBEDDED PATTERN, SOLIDIFYING THE DOCTOR BLADED SLURRY BY DRYING, AND REMOVING THE GREEN DOCTOR BLADED FERRITE SHEET FROM THE PLATE TO EXPOSE THE RESULTING DEPRESSION PATTERN, APPLYING A PASTE OF NON-MAGNETIC CONDUCTIVE POWDER AND ORGANIC VEHICLE INTO THE DEPRESSION PATTERN IN SAID DOCTOR BLADED FERRITE SHEET, SAID NON-MAGNETIC CONDUCTIVE POWDER BEING SELECTED FROM THE CLASS OF REFRACTORY METALS INCLUDING PALLADIUM, PLATINUM RHODIUM AND RHENIUM, SAID VEHICLE BEING A GREASE, PRESSURE LAMINATING ANOTHER GREEN FERRITE SHEET OVER THE SURFACE OF SAID GREEN FERRITE SHEET HAVING AN EMBEDDED PASTE PATTERN, AND FIRING THE LAMINATION TO SINTER THE FERRITE, SAID NON-MAGNETIC PASTE INCLUDING A PROPORTION OF ORGANIC VEHICLE WHICH WHEN DRIVEN OFF BY SAID FIRING RESULTS IN A SHRINKAGE OF THE VOLUME OF THE NONMAGNETIC PASTE BY AN AMOUNT SLIGHTLY LESS THAN OR EQUAL TO THE SHRINKAGE OF THE SURROUNDING FERRITE ON FIRING.
Claim 2
Independent Claim
179 words
THE METHOD OF FORMING A SHEET OF UNIFORM HOMOGENEOUS SINTERED MAGNETIC FERRITE HAVING AN EMBEDDED PATTERN OF NON-MAGNETIC MATERIAL, COMPRISING THE STEPS OF DOCTOR BLADING A FERRITE SLURRY OVER A PLATE HAVING A RAISED PATTERN CORRESPONDING TO THE DESIRED EMBEDDED PATTERN, SOLIDIFYING THE DOCTOR BLADED SLURRY BY DRYING, AND REMOVING THE GREEN DOCTOR BLADED FERRITE SHEET FROM THE PLATE TO EXPOSE THE RESULTING DEPRESSION PATTERN, APPLYING A PASTE OF NON-MAGNETIC CONDUCTIVE POWDER AND ORGANIC VEHICLE INTO THE DEPRESSION PATTERN IN SAID DOCTOR BLADED FERRITE SHEET, SAID NON-MAGNETIC CONDUCTIVE POWDER BEING SELECTED FROM THE CLASS OF REFRACTORY METALS INCLUDING PALLADIUM, PLATINUM RHODIUM AND RHENIUM, SAID VEHICLE BEING A GREASE, PRESSURE LAMINATING ANOTHER GREEN FERRITE SHEET OVER THE SURFACE OF SAID GREEN FERRITE SHEET HAVING AN EMBEDDED PASTE PATTERN, AND FIRING THE LAMINATION TO SINTER THE FERRITE, SAID NON-MAGNETIC PASTE INCLUDING A PROPORTION OF ORGANIC VEHICLE WHICH WHEN DRIVEN OFF BY SAID FIRING RESULTS IN A SHRINKAGE OF THE VOLUME OF THE NONMAGNETIC PASTE BY AN AMOUNT SLIGHTLY LESS THAN OR EQUAL TO THE SHRINKAGE OF THE SURROUNDING FERRITE ON FIRING.
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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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |