Patents by Inventor Shoichi Iwai

Shoichi Iwai 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).

  • Mullite-based ceramic body
    Patent number: 4935390
    Abstract: A sintered mullite-based body having an excellent dielectric constant and thermal expansion coefficient, and an improved flexural strength and surface smoothness, is obtained by heat treating a composition of 99.1 to 80% by weight of a mullite powder and 0.1 to 20% by weight of yttrium oxide as a sintering agent, optionally together with a colorant of MoO.sub.3.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: June 19, 1990
    Assignee: Shinko Electric Industries Co., Ltd.
    Inventors: Michio Horiuchi, Kihou Mizushima, Shoichi Iwai