Patents by Inventor Akira Shiraki

Akira Shiraki 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-reinforced concrete and method for preparing the same
    Patent number: 5685902
    Abstract: A carbon fiber-reinforced concrete containing a cement, a coarse aggregate, a fine aggregate, a carbon fiber and water, the carbon fiber having an average length not less than the maximum size of the coarse aggregate and also a tensile strength of at least 300 kgf/mm.sup.2.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: November 11, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Mitsuharu Tezuka, Mitsuru Awata, Akira Shiraki
  • Short carbon fiber chopped strands and short carbon fiber reinforced hydraulic composite materials
    Patent number: 5679149
    Abstract: The present invention provides a short carbon fiber reinforced hydraulic composite material making the best use of physical properties of short carbon fibers incorporated as reinforcing material. Microparticles are deposited on the short carbon fibers in an amount of 0.5 to 3 wt. %. These microparticles also have a particle diameter of 5 microns or less.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: October 21, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Mitsuharu Tezuka, Mitsuru Awata, Akira Shiraki
  • Method of producing an adsorbent for separation and recovery of CO
    Patent number: 4914076
    Abstract: The adsorbent for separation and recovery of CO is prepared by contacting an alumina or silica-alumina carrier with a mixed solution or dispersion of a cupric salt and a reducing agent in a solvent and, then, removing the solvent. The preferred cupric salt is cupric chloride.
    Type: Grant
    Filed: December 1, 1988
    Date of Patent: April 3, 1990
    Assignee: Kansai Netsukagaku Kabushiki Kaisha
    Inventors: Toshiaki Tsuji, Akira Shiraki, Hiroaki Shimono