Patents by Inventor Masataka Shiwa

Masataka Shiwa 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).

  • Insulating varnish and insulated electrical wire using same
    Patent number: 9378863
    Abstract: An insulating varnish forms an insulating coating film having a shape that corresponds to the shape of an opening of a die, having a uniform thickness. The insulating varnish is applied onto a surface of a conductor, subsequently passes through a die to remove the excess applied insulating varnish, and is then dried or baked to form an insulating coating film on the surface of the conductor. The insulating varnish has a viscosity of 10 Pa·s or more measured by a B-type viscometer at 30° C. The insulating varnish preferably contains no filler, and is preferably a polyimide precursor solution. Since the insulating varnish has a high viscosity, baking and solidification can be performed while maintaining a shape formed when the insulating varnish passes through a die.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: June 28, 2016
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC WINTEC, INC.
    Inventors: Kengo Yoshida, Masaaki Yamauchi, Masataka Shiwa, Yuji Hatanaka, Junichi Imai, Jun Sugawara, Toru Shimizu, Hideaki Saito, Yuudai Furuya
  • INSULATING VARNISH AND INSULATED ELECTRICAL WIRE USING SAME
    Publication number: 20140054062
    Abstract: An insulating varnish forms an insulating coating film having a shape that corresponds to the shape of an opening of a die, having a uniform thickness. The insulating varnish is applied onto a surface of a conductor, subsequently passes through a die to remove the excess applied insulating varnish, and is then dried or baked to form an insulating coating film on the surface of the conductor. The insulating varnish has a viscosity of 10 Pa·s or more measured by a B-type viscometer at 30° C. The insulating varnish preferably contains no filler, and is preferably a polyimide precursor solution. Since the insulating varnish has a high viscosity, baking and solidification can be performed while maintaining a shape formed when the insulating varnish passes through a die.
    Type: Application
    Filed: November 5, 2012
    Publication date: February 27, 2014
    Applicants: SUMITOMO ELECTRIC WINTEC, INC., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kengo Yoshida, Masaaki Yamauchi, Masataka Shiwa, Yuji Hatanaka, Junichi Imai, Jun Sugawara, Toru Shimizu, Hideaki Saito, Yuudai Furuya