Patents by Inventor Kaori OKUMOTO

Kaori OKUMOTO 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).

  • Patent number: 11460789
    Abstract: A charging roller comprises a shaft member, a base layer located outside in the radial direction of the shaft member, and a surface layer located outside in the radial direction of the base layer and forming a surface. The surface layer includes particles, and the ratio of the total area of the particles exposed from the surface of the surface layer in a planar view seen from the radial direction of the charging roller, with respect to the area of the surface of the surface layer is more than 60%.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: October 4, 2022
    Assignee: Archem Inc.
    Inventors: Makoto Otsuru, Kaori Okumoto
  • Publication number: 20220291606
    Abstract: Provided is a charging roller that can achieve excellent image quality and prevent detachment of particles in its surface layer. A charging roller 1 comprises a shaft 2 and, on an outer circumferential side of the shaft 2, at least a base layer 3 and a surface layer 4, wherein the surface layer 4 contains a binder resin 41 and particles 42, and the particles 42 contain 50 mass% or more of a same component A as at least one selected from components constituting the binder resin 41, and a content of the particles in the surface layer is 30 parts to 120 parts by mass with respect to 100 parts by mass of the binder resin.
    Type: Application
    Filed: December 11, 2019
    Publication date: September 15, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Kaori OKUMOTO, Makoto OTSURU
  • Publication number: 20220066350
    Abstract: A charging roller comprises a shaft member, a base layer located outside in the radial direction of the shaft member, and a surface layer located outside in the radial direction of the base layer and forming a surface. The surface layer includes particles, and the ratio of the total area of the particles exposed from the surface of the surface layer in a planar view seen from the radial direction of the charging roller, with respect to the area of the surface of the surface layer is more than 60%.
    Type: Application
    Filed: December 12, 2019
    Publication date: March 3, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Makoto OTSURU, Kaori OKUMOTO
  • Publication number: 20200166865
    Abstract: A laminate includes, in order, a base layer, an intermediate layer and a surface layer, wherein: the base layer is a polymerized product of a base layer composition containing at least compound A having a (meth)acryloyl group; the intermediate layer is a polymerized product of an intermediate layer composition containing (i) compound B having two or more functional groups, at least one of which being (meth)acryloyl group, and (ii) compound C having two or more functional groups, at least one of which being hydroxyl group; the surface layer is a polymerized product of a surface layer composition containing at least compound D having an isocyanate group; the (meth)acryloyl group in the base layer is bonded to the (meth)acryloyl group in the intermediate layer composition; and the hydroxyl group in the intermediate layer is bonded to the isocyanate group in the surface layer composition.
    Type: Application
    Filed: February 1, 2017
    Publication date: May 28, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Akihide OSAKU, Kaori OKUMOTO