Patents by Inventor Toshio Ichida

Toshio Ichida has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for forming an insulating coating on an oriented silicon steel sheet
    Patent number: 3985583
    Abstract: An insulating coating having a high adhesion on an oriented silicon steel sheet, which applies a tension on the surface of the steel sheet and restrains magnetostriction increased when compressive stress is subjected to said oriented silicon steel sheet, is formed by applying a coating aqueous dispersion of 7 - 24% by weight of colloidal silica and 5 - 30% by weight of magnesium phosphate in monobasic magnesium phosphate on the oriented silicon steel sheet and baking the thus treated steel sheet at a temperature of 350.degree. - 900.degree.C. Said coating is more improved by adding 0.01 - 5% by weight of at least one of chromic anhydride, chromates and bichromates to said coating aqueous dispersion.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: October 12, 1976
    Assignee: Kawasaki Steel Corporation
    Inventors: Hiroshi Shimanaka, Toshio Ichida, Shigeru Kobayashi