Patents by Inventor Yawara Ando

Yawara Ando 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).

  • Translucent alumina ceramic tube and a process for making same
    Patent number: 4799601
    Abstract: The disclosed process includes making a slip or slurry by mixing alumina powder, water, a deflocculant and a magnesium compound, casting the slip or slurry by drain casting and thereafter firing or sintering same. A coagulant is used as the deflocculant.A tube for a lamp, which is a unitary body of translucent alumina ceramic, has a large-diameter portion located at a central portion of the tube and two small-diameter portions located at both end portions of the tube. The tube is produced by drain casting. The tube has substantially the same wall thickness over its whole length. The inner surface of the tube is more smooth than its outer surface.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: January 24, 1989
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Shunzo Shimai, Yoshio Saito, Yawara Ando, Takashi Koseki