Grain-oriented electrical steel sheet having insulating film...

Details Grain-oriented electrical steel sheet having insulating film... Grain-oriented electrical steel sheet having insulating film...

2005-07-14

2010-12-14

Sheehan, John P (Department: 1793)

Metal treatment

Stock

Magnetic

C148S113000

Reexamination Certificate

active

07850792

ABSTRACT:
The present invention provides a grain-oriented electrical steel sheet product having a superior corrosion resistance, annealing resistance, film tension, and the like in insulating treatment based on a phosphate not containing chromium and a treatment agent for the same, so provides grain-oriented electrical steel sheet having an insulating film not containing chromium characterized by the insulating film containing a phosphate and one or more compounds selected from inorganic compounds of Fe, Ni, Co, Cu, Sr, and Mo in an amount, as metal elements, of 0.06 to 2.10 moles per mole of phosphate, and an insulating film agent of the same.

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Decision of Patent Grant for Invention dated Oct. 14, 2009, issued in corresponding Russian Patent Application No. 2008105618/02.
Allowance of Patent dated Apr. 29, 2010 issued in corresponding Korean application No. 7001075/2008.

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