Patents by Inventor Hiroyuki Kaidoo

Hiroyuki Kaidoo 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: 5019617
    Abstract: Rubber compositions are disclosed which exhibit enhanced dynamic modulus and tensile strength characteristics. A selected type of carbon black, resorcinsol and/or its precondensate and hexamethoxymethyl melamine are combined in specified amounts with a selected class of starting rubbers. The carbon black has specified nitrogen adsorption surface area, dibutyl phthalate adsorptivity and Dst mode of diameter.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: May 28, 1991
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Hiroyuki Kaidoo, Takao Muraki
  • Patent number: 4947916
    Abstract: Pneumatic radial tires are disclosed which are comprised of two or more belt plies reinforced respectively with an aramid fiber cord and a steel wire cord. Both cords are coated with one and the same rubber composition made up of a selected class of starting rubbers, sulfer, resorcinol and/or its precondensate, hexamethoxymethylmelamine and a selected class of cobalt compounds derived from organic acids. The belt plies excel in water-resistant adhesion and heat resistance and thus have freedom from ply separation, contributing to a radial tire of improved durability.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: August 14, 1990
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yasuhiro Ishikawa, Hiroyuki Kaidoo, Sadakazu Takei, Shuji Takahashi