Patents by Inventor Shigehiko Isoyama

Shigehiko Isoyama 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).

  • Cathodic electrodeposition paint
    Patent number: 5318681
    Abstract: Wet films of cathodic electrodeposition paints are rendered hardly susceptible to oil droplet-induced craters by incorporating a clay pigment surface treated with a silane coupling agent into the paint formulation. Surface smoothness and bath stability are not compromised by the addition of the clay pigment.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: June 7, 1994
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Kunio Murase, Shigehiko Isoyama, Koichi Iwamoto