Patents by Inventor Hiroyuki Takagishi

Hiroyuki Takagishi 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).

  • Carbon fiber prepreg, method for producing same and carbon fiber reinforced composite material
    Patent number: 9074064
    Abstract: A carbon fiber prepreg includes carbon fiber bundles containing numerous carbon fiber single yarns and a matrix resin impregnated in the carbon fiber bundles, the value of the coefficient of variation, displayed as a percentage, of the number of the carbon fiber single yarns contained per unit area being 10% or less, wherein in each unit area, the width and the depth from the surface of the carbon fiber prepreg in the cutting plane when the carbon fiber prepreg is cut at right angles to the array direction (direction of the fiber axis) of the carbon fiber bundles are 100 ?m and 30 ?m respectively. A carbon fiber prepreg may have a projected area of a carbon fiber single yarn which has a fiber orientation angle of 0°±3° or more is 2% or less of the projected area of all carbon fiber single yarns.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: July 7, 2015
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yuki Ozeki, Hiroyuki Takagishi, Go Kojitani
  • CARBON FIBER PREPREG, METHOD FOR PRODUCING SAME AND CARBON FIBER REINFORCED COMPOSITE MATERIAL
    Publication number: 20130274413
    Abstract: A carbon fiber prepreg includes carbon fiber bundles containing numerous carbon fiber single yarns and a matrix resin impregnated in the carbon fiber bundles, the value of the coefficient of variation, displayed as a percentage, of the number of the carbon fiber single yarns contained per unit area being 10% or less, wherein in each unit area, the width and the depth from the surface of the carbon fiber prepreg in the cutting plane when the carbon fiber prepreg is cut at right angles to the array direction (direction of the fiber axis) of the carbon fiber bundles are 100 ?m and 30 ?m respectively. A carbon fiber prepreg may have a projected area of a carbon fiber single yarn which has a fiber orientation angle of 0°±3° or more is 2% or less of the projected area of all carbon fiber single yarns.
    Type: Application
    Filed: December 1, 2011
    Publication date: October 17, 2013
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yuki Ozeki, Hiroyuki Takagishi, Go Kojitani