Patents by Inventor Koji Arato

Koji Arato 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 casting titanium or titanium-based alloy
    Patent number: 5065809
    Abstract: A method for producing a cast of titanium or a titanium-based alloy by fusing titanium or a titanium-based alloy containing an alloy element in a vacuum furnace while introducing argon gas therein and casting the resultant melt in mold, which method is characterized by adjusting the introduction of the argon gas so that the argon gas pressure (atm) in the furnace assumes the following magnitude proportionately to the alloy element content M (% by weight):Not less than 2.1 when 0.ltoreq.M<5Not less than 1.6 when 5.ltoreq.M<10Not less than 1.5 when 10.ltoreq.M<15Not less than 1.2 when 15.ltoreq.M.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: November 19, 1991
    Assignees: Mitsui Engineering & Shipbuilding Co., Ltd., Yasuo Yoneda, Takashi Sato
    Inventors: Takashi Sato, Yoji Iwanabe, Koji Arato, Rokuro Sakagami, Yasuo Yoneda