Patent US2961709A successfully refreshed from Google Patents.
US2961709A
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Method of fabricating special shaped ferrites
Assignee: International Business Machines Corp
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Filing: 1957-12-16
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Granted: 1960-11-29
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Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Barlane R Eichbaum
- 👤 Ernest C Schuenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A METHOD OF MAKING FERRITE BODIED FOR COMPUTER TYPE MECHANISIMS FORMING A MIXTURE OF FE2O3 AND OTHER SELECTED BIVALENT METAL OXIDES, DIE PRESSING THE MIXTURE INTO A THIN DISC, HEATING SAID DIC UNTIL IT ASSUMES A RIGID STATE, ULTRASONICALLY CUTTING A BODY OF DESIRED SHAPE FROM SAID DISC, THE STEP OF THEREAFTER SUBJECTING SAID BODY TO AN ADDITIONAL THERMAL TREATMENT AT 1000-1500*C. FOR 1-24 HOURS.
Claim 2
Dependent Claim
66 words
IN A METHOD OF MAKING FERRITE BODIED FOR COMPUTER TYPE MECHANISIMS FORMING A MIXTURE OF FE2O3 AND OTHER SELECTED BIVALENT METAL OXIDES, DIE PRESSING THE MIXTURE INTO A THIN DISC, HEATING SAID DIC UNTIL IT ASSUMES A RIGID STATE, ULTRASONICALLY CUTTING A BODY OF DESIRED SHAPE FROM SAID DISC, THE STEP OF THEREAFTER SUBJECTING SAID BODY TO AN ADDITIONAL THERMAL TREATMENT AT 1000-1500*C. FOR 1-24 HOURS.
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) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |