Patents by Inventor Kunitoshi Imura

Kunitoshi Imura 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).

  • Carrier for electrophotography, method for producing the same carrier, and developing agent for electrophotography using same
    Patent number: 6372401
    Abstract: Disclosed are a carrier for electrophotography, a method for producing the same carrier, and a developing agent using the same. The carrier includes a carrier core material with magnetism and a high-molecular-weight polyethylene resin that coats the surface of the carrier core material, wherein the surface of the high-molecular-weight polyethylene resin coating the surface of the carrier core material is coated with a resin layer having an ability to control an electric charge and a thickness of 0.01-2 &mgr;m or with a particle layer having an ability to control an electric charge and a thickness of 0.01-2 &mgr;m. The carrier for electrophotography and the developing agent using the same allow free control of its electrification polarity and free adjustment of the amount of electrification, taking advantage of excellent properties of the carrier having a polyolefin-based resin coat.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: April 16, 2002
    Assignees: Idemitsu Kosan Co., Ltd., Kyocera Corporation
    Inventors: Shigeo Matsuzaki, Kunitoshi Imura, Kouichi Matono