Patents by Inventor Kazuo Tsubuko

Kazuo Tsubuko 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 the preparation of a non-aqueous dispersion of thermoplastic resin
    Patent number: 3997488
    Abstract: This invention provides non-aqueous dispersions containing a graft-copolymer and at least one substance selected from the group consisting of wax and polyethylene in an organic solvent having a high resistivity and a low dielectric constant, said dispersions being useful for coatings, especially binders for use in electrostatic coating and toners for use in electrophotography.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: December 14, 1976
    Assignee: Ricoh Co., Ltd.
    Inventors: Kazuo Tsubuko, Eiichi Kawamura
  • Non-aqueous dispersion and process of preparing same
    Patent number: 3992342
    Abstract: A non-aqueous dispersion containing a graft copolymer and at least one substance selected from the group consisting of polyethylene, polyethylene wax and paraffin wax in a liquid carrier (an organic solvent) having a high resistivity and a low dielectric constant and a process of preparing said non-aqueous dispersion.
    Type: Grant
    Filed: July 10, 1975
    Date of Patent: November 16, 1976
    Assignee: Ricoh Co., Ltd.
    Inventors: Kazuo Tsubuko, Yukihiko Nakagawa, Kenichi Matsubayashi, Yoshihiko Kido