Patents by Inventor Hideki Ganbayashi

Hideki Ganbayashi 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 PIGMENT COMPOSITION
    Publication number: 20220372324
    Abstract: An object of the present invention is to provide a method for producing a pigment composition that can achieve both a reduction in the number of coarse particles that may be contained in the pigment composition and improvement in the production efficiency of the pigment composition. The present invention relates to a method for producing a pigment composition in which a pigment is dispersed in a liquid medium by a pigment dispersion resin by undergoing step 1 in which a raw material composition containing the pigment, the pigment dispersion resin, and the liquid medium is processed with a dispersing machine, the dispersing machine being a dispersing machine including a configuration allowing the raw material compositions to collide with each other.
    Type: Application
    Filed: November 5, 2020
    Publication date: November 24, 2022
    Applicant: DIC Corporation
    Inventors: Wakana Naito, Shoichi Hotate, Kenji Sugo, Hideki Ganbayashi
  • METHOD FOR PRODUCING PIGMENT COMPOSITION
    Publication number: 20220363910
    Abstract: An object of the present invention is to provide a method for producing a pigment composition that can efficiently reduce the number of coarse particles in a pigment composition such as an aqueous pigment dispersion. The inventors of the present invention have achieved this object by a method of producing a pigment composition for ink, including a processing step of crushing or cracking a pigment component in a raw material composition containing the pigment component and a liquid medium using a rotor-stator processing machine 100.
    Type: Application
    Filed: October 8, 2020
    Publication date: November 17, 2022
    Applicant: DIC Corporation
    Inventors: Wakana Naito, Shoichi Hotate, Kenji Sugo, Hideki Ganbayashi
  • Charge-controlling agent and toner using the same
    Patent number: 6562536
    Abstract: A charge-controlling agent comprising a polyamine having a repeating structure represented by the following general formula (I): The symbols in the formula are defined in the specification. Also disclosed is a toner using the charge-controlling agent.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: May 13, 2003
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Keiichi Fujii, Hideki Ganbayashi
  • Charge-controlling agent and toner using the same
    Publication number: 20020081512
    Abstract: A charge-controlling agent comprising a polyamine having a repeating structure represented by the following general formula (I): 1
    Type: Application
    Filed: October 24, 2001
    Publication date: June 27, 2002
    Applicant: DAINIPPON INK AND CHEMICALS, INC.
    Inventors: Keiichi Fujii, Hideki Ganbayashi