Patents by Inventor Koji Sanefuji

Koji Sanefuji 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).

  • FLEXIBLE POLYURETHANE FOAM, AUTOMOBILE SEAT PAD, AND FLEXIBLE POLYURETHANE FOAM PRODUCTION METHOD
    Publication number: 20210230424
    Abstract: Provided is a flexible polyurethane foam having high hardness required for weight reduction of members and having low stress relaxation. A flexible polyurethane foam comprises a structural protein fiber having a length of 0.1 mm to 5 mm.
    Type: Application
    Filed: July 5, 2019
    Publication date: July 29, 2021
    Applicants: BRIDGESTONE CORPORATION, SPIBER INC.
    Inventors: Koji SANEFUJI, Hideharu SEGUCHI, Toshiki TAKIZAWA, Naoko NISIKITA
  • COMPOSITION FOR SOFT POLYURETHANE FOAM, SOFT POLYURETHANE FOAM, AND VEHICLE SEAT PAD
    Publication number: 20200140642
    Abstract: This composition for a soft polyurethane foam contains a polyol component, an isocyanate component, a foaming agent, a cell opening agent, and a catalyst. The catalyst is a C11 or higher amine and the cell opening agent is a polyol in which the content of ethylene oxide is more than 50 mol %.
    Type: Application
    Filed: December 10, 2019
    Publication date: May 7, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Koji SANEFUJI, Mitsuhiko WATANABE, Hideharu SEGUCHI
  • Seat pad
    Patent number: 9221369
    Abstract: A seat pad (10) that is mounted in a vehicle and used as a seating portion is provided with: a first layer (11) that is formed by a first foam body (A), and a second layer (12) that is formed by a second foam body (B) and that is laminated to the first layer, wherein the first foam body has at least one of an Asker F hardness and a hysteresis loss that is greater than in the second foam body, and the second foam body has a greater modulus of repulsion elasticity than the first foam body.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: December 29, 2015
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Koji Sanefuji, Kenji Kumagai, Kazushige Ebe
  • SEAT PAD
    Publication number: 20140252838
    Abstract: A seat pad (10) that is mounted in a vehicle and used as a seating portion is provided with: a first layer (11) that is formed by a first foam body (A), and a second layer (12) that is formed by a second foam body (B) and that is laminated to the first layer, wherein the first foam body has at least one of an Asker F hardness and a hysteresis loss that is greater than in the second foam body, and the second foam body has a greater modulus of repulsion elasticity than the first foam body.
    Type: Application
    Filed: October 12, 2012
    Publication date: September 11, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Koji Sanefuji, Kenji Kumagai, Kazushige Ebe