US2812276A
Expired / Lapsed
US
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High frequency cores
Assignee: Huntington Alloys Corp
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Filing: 1954-06-29
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Granted: 1957-11-05
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Expires: 1974-06-29
Abstract
No abstract record available.
Inventors
- 👤 De Witt H West
- 👤 David M Llewelyn
- 👤 Ronald W Floyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:38
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A MAGNETIC CORE SUITABLE FOR USE AT HIGH FREQUENCIES OF UP TO ABOUT 50 MEGACYCLES AND HIGHER AND HAVING A HIGH Q VALUE SAID CORE COMPRISING A NITRIDED CARBONYL IRON POWDER WHICH HAS A CARBON CONTENT OF ABOUT 0.1% TO 0.9% AND WHICH CONTAINS SUCH AN AMOUNT OF NITROGEN THAT SAID NITRIDED POWDER IS IN A FORM CORRESPONDING TO SUBSTANTIALLY ALL GAMMA'' PHASE.
Claim 2
Dependent Claim
63 words
A MAGNETIC CORE SUITABLE FOR USE AT HIGH FREQUENCIES OF UP TO ABOUT 50 MEGACYCLES AND HIGHER AND HAVING A HIGH Q VALUE SAID CORE COMPRISING A NITRIDED CARBONYL IRON POWDER WHICH HAS A CARBON CONTENT OF ABOUT 0.1% TO 0.9% AND WHICH CONTAINS SUCH AN AMOUNT OF NITROGEN THAT SAID NITRIDED POWDER IS IN A FORM CORRESPONDING TO SUBSTANTIALLY ALL GAMMA'' PHASE.
References Cited (Backward Citations)
US2666724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |