Metal treatment – Stock – Magnetic
Reexamination Certificate
2007-12-06
2011-11-08
Sheehan, John (Department: 1736)
Metal treatment
Stock
Magnetic
C148S104000, C428S403000
Reexamination Certificate
active
08052806
ABSTRACT:
A powder magnetic core is provided for operating at high frequencies that is obtained by pressure forming an iron-based magnetic powder covered with an insulation film, which has a specific resistance more than 1000, preferably more than 2000, and most preferably more than 3000 μΩm, and a saturation magnetic flux density B above 1.5, preferably above 1.7, and most preferably above 1.9 (T). A method for the preparation of such cores as well as a powder which is suitable for the preparation also are provided.
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Decision to Grant issued in Russian counterpart No. 2009125920, dated Jan. 25, 2011.
International Search Report (PCT/ISA/210) for PCT/SE2007/050945 completed Mar. 5, 2008.
Written Opinion (PCT/ISA/237) for PCT/SE2007/050945 completed Mar. 10, 2008.
Skårman Björn
Ye Zhou
Buchanan & Ingersoll & Rooney PC
Hëganäs AB
Sheehan John
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