Patents by Inventor Yoshishige Tsumura

Yoshishige Tsumura 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 refinement of impure aluminum
    Patent number: 4430174
    Abstract: Refinement of impure aluminum is accomplished by a method which comprises placing the impure aluminum in a molten form as an anode on one side of a porous article impregnated with a fused-salt electrolytic bath, disposing a cathode on the other side of the porous article, and passing direct current between the cathode and the anode.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: February 7, 1984
    Assignees: Mitsui Aluminium Co., Ltd., Yoshishige Tsumura
    Inventor: Yoshishige Tsumura
  • Demagging process for aluminum alloy without air pollution
    Patent number: 4183745
    Abstract: Removal of magnesium from a magnesium-containing aluminum alloy is obtained by melting the aluminum alloy, superposing a layer of molten flux containing chlorides or fluorides upon the molten aluminum alloy, and passing an electric current between the molten aluminum and the molten flux for thereby causing magnesium to pass from the aluminum layer into the flux layer and form magnesium chloride or magnesium fluoride.
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: January 15, 1980
    Inventor: Yoshishige Tsumura
  • Process for production of aluminum
    Patent number: 4159928
    Abstract: Disclosed herein is a process for producing aluminum by the steps of electrolyzing an electrolytic bath composed preponderantly of aluminum chloride while using a tungsten plate or a silicon carbide plate as the anode for thereby educing aluminum on the cathode, splitting the cathodic product of electrolysis from the cathode to produce in the electrolytic cell a muddy substance composed preponderantly of aluminum, collecting the muddy substance, then melting it to produce molten aluminum and cooling the molten aluminum.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: July 3, 1979
    Assignee: Mitsui Aluminium Co., Ltd.
    Inventor: Yoshishige Tsumura
  • Process for production of aluminum
    Patent number: 4108741
    Abstract: Disclosed herein is a process for producing aluminum of high purity by the steps of electrolyzing an electrolytic bath composed preponderantly of aluminum chloride or aluminum bromide for thereby educing aluminum on the cathode, causing the cathodic product of electrolysis to precipitate to the bottom of the electrolytic cell, then melting the precipitate to produce molten aluminum, casting the molten aluminum into ingots and cooling the ingots.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: August 22, 1978
    Assignee: Mitsui Aluminum Co., Ltd.
    Inventor: Yoshishige Tsumura