US2976174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oriented magnetic cores
Assignee: Unisys Corp
•
Filing: 1955-03-22
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Granted: 1961-03-21
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Expires: 1975-03-22
Abstract
No abstract record available.
Inventors
- 👤 John H Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:23
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/14; H01F41/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF PRODUCING MAGNETIC CORES HAVING SQUARE HYSTERESIS LOOPS, WHICH COMPRISES THE STEPS OF PLACING A SLEEVE OF INSULATING MATERIAL AROUND A CURRENT CONDUCTOR, DRIVING A DIRECT CURRENT THROUGH SAID CONDUCTOR TO GENERATE A MAGNETIC FIELD AROUND SAID SLEEVE, EFFECTIVELY VAPORIZING MAGNETIC METALLIC MATERIAL IN THE VICINITY OF SAID SLEEVE, AND DEPOSITING SAID VAPORIZED MAGNETIC MATERIAL UPON SAID SLEEVE WHILE SAID MAGNETIC FIELD IS PRESENT.
Claim 2
Independent Claim
66 words
THE METHOD OF PRODUCING MAGNETIC CORES HAVING SQUARE HYSTERESIS LOOPS, WHICH COMPRISES THE STEPS OF PLACING A SLEEVE OF INSULATING MATERIAL AROUND A CURRENT CONDUCTOR, DRIVING A DIRECT CURRENT THROUGH SAID CONDUCTOR TO GENERATE A MAGNETIC FIELD AROUND SAID SLEEVE, EFFECTIVELY VAPORIZING MAGNETIC METALLIC MATERIAL IN THE VICINITY OF SAID SLEEVE, AND DEPOSITING SAID VAPORIZED MAGNETIC MATERIAL UPON SAID SLEEVE WHILE SAID MAGNETIC FIELD IS PRESENT.
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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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |