Patents by Inventor Shunki KATSUMATA

Shunki KATSUMATA 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).

  • TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND PRODUCTION METHOD THEREOF
    Publication number: 20230205106
    Abstract: A toner includes toner particles. Each toner particle includes a binder resin, a release agent, a colorant, and particles. The particles are metal particles, or halogen particles, or both. A metal constituting the metal particles may have a monovalent or higher ionic valence. An abundance X of the particles is within a range represented by 3 ?m2?X ?m2?10 ?m2. X ?m2 is the abundance X that is an area of the particles present in a surface portion of each of the toner particles as measured by SEM-EDX with setting acceleration voltage to 1 kV. A declining rate of the particles is 80% to 100%. Y ?m2 is an abundance Y that is an area of the particles present in a surface portion of each of the toner particles as measured by the SEM-EDX with setting acceleration voltage to 3 kV.
    Type: Application
    Filed: December 20, 2022
    Publication date: June 29, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Shunki KATSUMATA, Toshihiko Karato, Taro Araki, Shintaro Akiyama