Patents by Inventor Naoya Inazumi

Naoya Inazumi 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 producing liquid developer
    Patent number: 8722302
    Abstract: The present invention provides a method for producing a liquid developer for electrophotography or electrostatic recording obtained by a coacervation method, which sufficiently maintains the charging property and has good dispersion stability of colored resin particles, as well as a liquid developer obtained by the method. A method for producing a liquid developer by a coacervation method, wherein a colored resin particle is dispersed in an insulating hydrocarbon dispersion medium in the presence of a particle dispersant and an acid group-containing resin, and the particle dispersant is a reaction product of a polyamine compound and a self-condensation product of a hydroxycarboxylic acid.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: May 13, 2014
    Assignee: Sakata Inx Corp.
    Inventors: Hirohito Maeda, Katsutoshi Okamoto, Takaaki Yodo, Naoya Inazumi, Koji Iwase
  • METHOD FOR PRODUCING LIQUID DEVELOPER
    Publication number: 20100323291
    Abstract: The present invention provides a method for producing a liquid developer for electrophotography or electrostatic recording obtained by a coacervation method, which sufficiently maintains the charging property and has good dispersion stability of colored resin particles, as well as a liquid developer obtained by the method. A method for producing a liquid developer by a coacervation method, wherein a colored resin particle is dispersed in an insulating hydrocarbon dispersion medium in the presence of a particle dispersant and an acid group-containing resin, and the particle dispersant is a reaction product of a polyamine compound and a self-condensation product of a hydroxycarboxylic acid.
    Type: Application
    Filed: September 26, 2008
    Publication date: December 23, 2010
    Applicant: SAKATA INX CORP.
    Inventors: Hirohito Maeda, Katsutoshi Okamoto, Takaaki Yodo, Naoya Inazumi, Koji Iwase