US2992990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft magnetic material
Assignee: Individual
•
Filing: 1956-01-05
•
Granted: 1961-07-18
•
Expires: 1976-01-05
Abstract
No abstract record available.
Inventors
- 👤 Richard G Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625; C04B35/2658; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
155 words
A SOFT MAGNETIC MATERIAL FORMED BY INTIMATELY MIXING, A SINTERING AT A TEMPERATURE IN THE RANGE FROM APPROXIMATELY 2160*F. TO APPROXIMATELY 2240*F., FE2O3 ABOUT 54 MOL PERCENT, ZNO ABOUT 17 MOL PERCENT, MNO2 ABOUT 27 MOL PERCENT, MGSIO2 ABOUT 1 MOL PERCENT, AND SILICA ABOUT 1 MOL PERCENT, MIXING SAID MATERIALS WITH AN ORGANIC BINDER AND LUBRICANT ABOUT 1 PERCENT BY WEIGHT AND WITH THE MOISTURE SUFFICIENT TO PRODUCE A PLASTIC MASS, FORMING TO THE DESIRE SHAPE, DRYING AND SINTERING AT THE SAID TEMPERATURE IN AIR, IN WHICH THE EXCESS OF AIR IS IN THE RANGE OF 20 TO 40%, AND COOLING THE MATERIAL AS RAPIDLY AS POSSIBLE, WITHOUT CAUSING FRACTURE OF THE BODY, AT APPROXIMATELY 25*C. PER MINUTE, AND GRINDING AWAY THE SURFACE LAYER AT VARIOUS POINTS LEAVING A CONDUCTING PATH OF CONTROLLABLE RESISTANCE VALUE AND THEREBY PROVIDING A MEANS FOR PRODUCING AN INDUCTANCE AND RESISTANCE IN PARALLEL OR SERIES IN A SINGLE COMPONENT.
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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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |