Patents by Inventor Hisafumi MIZUTA

Hisafumi MIZUTA 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).

  • Sizing agent coated carbon fiber, method for producing sizing agent coated carbon fiber, carbon fiber reinforced composite material, and method for producing carbon fiber reinforced composite material
    Patent number: 11118022
    Abstract: Sizing agent coated carbon fibers obtained by coating carbon fibers with a sizing agent comprising at least one of (A) to (C) in a total amount of 80 mass % or more with respect to the whole sizing agent, the carbon fibers each having a surface layer which has a thickness of 10 nm or larger and has an oxygen content of 4% or higher with respect to all the elements, wherein when the sizing agent coated carbon fibers are subjected three times to a 10-minute ultrasonic treatment in an acetone solvent, then the amount of the remaining sizing agent is 0.1-0.25 parts by mass per 100 parts by mass of the sizing agent coated carbon fibers.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: September 14, 2021
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Tomoko Ichikawa, Kazuki Yoshihiro, Hisafumi Mizuta, Makoto Endo
  • SIZING AGENT COATED CARBON FIBER, METHOD FOR PRODUCING SIZING AGENT COATED CARBON FIBER, CARBON FIBER REINFORCED COMPOSITE MATERIAL, AND METHOD FOR PRODUCING CARBON FIBER REINFORCED COMPOSITE MATERIAL
    Publication number: 20180346668
    Abstract: Sizing agent coated carbon fibers obtained by coating carbon fibers with a sizing agent comprising at least one of (A) to (C) in a total amount of 80 mass % or more with respect to the whole sizing agent, the carbon fibers each having a surface layer which has a thickness of 10 nm or larger and has an oxygen content of 4% or higher with respect to all the elements, wherein when the sizing agent coated carbon fibers are subjected three times to a 10-minute ultrasonic treatment in an acetone solvent, then the amount of the remaining sizing agent is 0.1-0.25 parts by mass per 100 parts by mass of the sizing agent coated carbon fibers.
    Type: Application
    Filed: January 13, 2016
    Publication date: December 6, 2018
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Tomoko ICHIKAWA, Kazuki YOSHIHIRO, Hisafumi MIZUTA, Makoto ENDO