US3348982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron powder and core with controlled permeability coefficient
Assignee: Huntington Alloys Corp
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Filing: 1964-02-24
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Granted: 1967-10-24
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Expires: 1984-02-24
Abstract
No abstract record available.
Inventors
- 👤 Dunton Thornley Athelstan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:57
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0292; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS OF USING AS AN INDUCTOR CORE AN AGGLOMERATE BODY CONTAINING IRON POWDER COMPRISING INDUCTIVELY COUPLING AN AGGLOMERATE POWDER BODY CONTAINING CARBONYL-IRON POWDER CONSISTING ESSENTIALLY OF 7% TO ABOUT 10% NITROGEN, ABOUT 0.5% TO ABOUT 2% CARBON, WITH A TOTAL NITROGEN PLUS CARBON CONTENT OF 9.0% TO ABOUT 10.5%, AND THE BALANCE ESSENTAILLY IRON AND HAVING A MICROSTRUCTURE CONSISTING ESSENTIALLY OF EPSILON PHASE WITH AN ELECTRICALLY CONDUCTIVE ELEMENT DISPOSED IN CLOSE PROXIMITY TO SAID BODY BY PASSING AN ELECTRIC CURRENT THROUGH SAID ELECTRICALLY CONDUCTIVE ELEMENT TO CHARACTERIZE SAID CORE BY A TEMPERATURE COEFFICIENT OF PERMEABILITY NOT GREATER THAN 5 TIME 10**-6 PER * C.
Claim 2
Dependent Claim
105 words
A PROCESS OF USING AS AN INDUCTOR CORE AN AGGLOMERATE BODY CONTAINING IRON POWDER COMPRISING INDUCTIVELY COUPLING AN AGGLOMERATE POWDER BODY CONTAINING CARBONYL-IRON POWDER CONSISTING ESSENTIALLY OF 7% TO ABOUT 10% NITROGEN, ABOUT 0.5% TO ABOUT 2% CARBON, WITH A TOTAL NITROGEN PLUS CARBON CONTENT OF 9.0% TO ABOUT 10.5%, AND THE BALANCE ESSENTAILLY IRON AND HAVING A MICROSTRUCTURE CONSISTING ESSENTIALLY OF EPSILON PHASE WITH AN ELECTRICALLY CONDUCTIVE ELEMENT DISPOSED IN CLOSE PROXIMITY TO SAID BODY BY PASSING AN ELECTRIC CURRENT THROUGH SAID ELECTRICALLY CONDUCTIVE ELEMENT TO CHARACTERIZE SAID CORE BY A TEMPERATURE COEFFICIENT OF PERMEABILITY NOT GREATER THAN 5 TIME 10**-6 PER * C.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |