Patents by Inventor Ritsuko Kato

Ritsuko Kato 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).

  • Resin compositions and printed circuit boards using the same
    Patent number: 5589250
    Abstract: A resin composition as well as a printed circuit board using the same are disclosed. The resin composition is formed by dispersing powder of a cured heat-resistant resin powder soluble in acid or oxidizing agent into a matrix of an uncured photosensitive resin hardly soluble in acid or oxidizing agent, in which a coloring matter is added to the resin matrix and/or the heat-resistant resin powder.
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: December 31, 1996
    Assignee: Ibiden Co., Ltd.
    Inventors: Motoo Asai, Ritsuko Kato