Patents by Inventor Makota Yoda

Makota Yoda 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 producing ethylene polymers
    Patent number: 4485187
    Abstract: A catalyst for polymerizing ethylene and .alpha.-olefins and process for producing ethylene polymers which comprises homopolymerizing ethylene or copolymerizing ethylene and other olefins in the presence of a catalyst comprising a catalyst component and an organoaluminum compound, said catalyst component being obtained by mechanically copulverizing (A) a magnesium halide and (B) magnesium hydrocarbyloxide at a molar ratio of B/A=0.5 to 1.5 and subsequently bringing the resulting pulverized product into contact with a tetravalent titanium halide in the presence of a hydrocarbon and/or halogenated hydrocarbon.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: November 27, 1984
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Takeshi Nomura, Kouji Maruyama, Hiroshi Ueno, Naomi Inaba, Makota Yoda
  • Catalyst component for polymerization of olefins
    Patent number: 4485186
    Abstract: A catalyst component for polymerization of olefins which is prepared by bringing a magnesium alkoxide, a halogenated hydrocarbon, and a titanium compound into contact with one another. The catalyst component together with a organoaluminum cocatalyst is used for the polymerization of olefins and especially for the homopolymerization of ethylene and copolymerization of ethylene with an .alpha.-olefin having from 3 to 10 carbon atoms.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: November 27, 1984
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Ueno, Tadanao Kohara, Takeshi Nomura, Kouji Maruyama, Naomi Inaba, Makota Yoda