Metal treatment – Stock – Magnetic
Reexamination Certificate
2009-02-13
2011-10-11
Sheehan, John (Department: 1736)
Metal treatment
Stock
Magnetic
C148S111000
Reexamination Certificate
active
08034196
ABSTRACT:
A grain-oriented electrical steel plate is characterized in that grooves having a width of 10 μm to 200 μm and a depth of 10 μm to 30 μm exist in at least one of a front surface and a rear surface of a steel plate at intervals of 1 mm to 10 mm, an angle between a direction in which the grooves extend and a rolling direction of the steel plate is 60 degrees to 120 degrees, and tensile stresses having a maximum value of 20 MPa to 300 MPa act in the rolling direction within ranges of 10 μm to 300 μm from side surfaces of the grooves.
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International Search Report, dated May 19, 2009, issued in corresponding PCT/JP2009/052414.
Hamamura Hideyuki
Iwata Keiji
Birch & Stewart Kolasch & Birch, LLP
Nippon Steel Corporation
Sheehan John
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