Stock material or miscellaneous articles – Magnetic recording component or stock – Binder media
Reexamination Certificate
2004-09-22
2008-08-26
Wyszomierski, George (Department: 1793)
Stock material or miscellaneous articles
Magnetic recording component or stock
Binder media
C148S306000
Reexamination Certificate
active
07416795
ABSTRACT:
A method for manufacturing magnetic metal powder is provided. In the method, a powdered magnetic metal oxide is supplied to a heat treatment furnace with a carrier gas composed of a reducing gas. The heat treatment furnace is maintained at temperatures above a reducing action starting temperature for the powdered magnetic metal oxide and above a melting point of the magnetic metal in the powder. The powdered magnetic metal oxide is subject to a reducing process, and then magnetic metal particles, the resultant reduced product, is melted to form a melt. The melt is re-crystallized in a succeeding cooling step, to obtain single crystal magnetic metal power in substantially spherical form.
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Akachi Yoshiaki
Kobuke Hisashi
Takaya Minoru
Uematsu Hiroyuki
Hogan & Hartson LLP
TDK Corporation
Wyszomierski George
LandOfFree
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