Patents by Inventor Sumio Nagata

Sumio Nagata 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).

  • Process for making porous masses of iron, nickel, titanium, and other metals
    Patent number: 4891182
    Abstract: A process for making a porous mass of a metal of iron- or titanium-group comprises steps of forming a sinter of solvent-soluble particles, pressing in a molten metal of the iron- or titanium- group into open interstices in the sinter, and eluting the particles from the composite of the sinter and metal. Solvent-soluble magnesia particles whose surface is either covered or not with a film of boric anhydride or solvent-soluble calcia particles whose surface is either covered or not with film of calcium chloride are sintered and machined into the desired shape. The formed sinter is put in a case of a heat-insulating material that can withstand the melting temperature of a metal of iron- or titanium-group. After being heated to a given temperature together with the case, the sinter is immediately put in a metal mold where a molten metal of iron- or titanium-group is pressed into open interstices in the sinter. Then, only the particles are eluted from the sinter-metal composite by a solvent.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: January 2, 1990
    Assignee: Agency of Industrial Science & Technology
    Inventors: Michiru Sakamoto, Akira Kitahara, Hidetoshi Ueno, Sumio Nagata
  • Foamed metal and method of producing same
    Patent number: 4713277
    Abstract: A foamed metal which has an apparent specific gravity of from 0.2 to 0.8 and comprises an aggregate of polygonal closed cells of from 2 to 10 mm in average diameter. The foamed metal is not only light in weight, free of directionality and structurally strong but also excellent in sound-absorbing and electromagnetic shielding properties, and is useful as constructional, structural or functional material. A method for producing the foamed material comprises adding calcium as a thickening agent to molten aluminum or alloy thereof in an amount of from 0.2 to 8% by weight, followed by agitating to adjust the viscosity of the melet, then adding from 1 to 3% by weight of powdered titanium hydride as a foaming agent to the melt, and agitating the melt to effect foaming.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: December 15, 1987
    Assignees: Agency of Industrial Science and Technology, Shinko Kosen Kogyo Kabushiki Kaisha
    Inventors: Shigeru Akiyama, Hidetoshi Ueno, Koji Imagawa, Akira Kitahara, Sumio Nagata, Kazuo Morimoto, Tooru Nishikawa, Masao Itoh
  • Method for the preparation of a spongy metallic body
    Patent number: 4556096
    Abstract: The invention provides an improved method for the preparation of a porous ongy body of a metal or alloy having an open cell structure. The basic principle of the method is the pressurized casting of a melt of the metal or alloy with a preheated powder compact of an inorganic compound soluble in a solvent to fill up the pores and dissolving away the inorganic compound with a solvent after solidification of the melt.
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: December 3, 1985
    Assignees: Director-General of the Agency of Industrial Science and Technology, Shachihata Kogyo K.K.
    Inventors: Sumio Nagata, Kazuhide Kanaiwa, Takashi Ichikawa