Patents by Inventor Hiroyoshi Oba

Hiroyoshi Oba 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).

  • Method for coating soot on a melt contact surface
    Patent number: 4879074
    Abstract: A method of coating on a melt contact surface such as that of an injection sleeve for casting, a plunger end face or a mold cavity comprises a step of charging the soot and the melt contact surface with opposite electrical polarities to thereby cause an electrodeposition of the charged soot on the melt contact surface. A preferred apparatus for the soot coating comprises means for producing an air stream surrounding a combustion gas stream including the soot and forming an air curtain for preventing the sprayed soot from scattering.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: November 7, 1989
    Assignee: Ube Industries, Ltd.
    Inventors: Yoshiharu Waku, Hideho Yoshioka, Hiroyoshi Oba, Kiyoshi Fujino