Patents by Inventor Yukio Tadokoro

Yukio Tadokoro 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).

  • Pneumatic aircraft tire with radially varying tread contour
    Patent number: 4262721
    Abstract: A highly durable pneumatic tire for aircraft is disclosed. The tire comprises a tread, a plurality of main grooves formed on the tread and extending substantially in the circumferential direction of the tire, and circumferential ribs spaced apart from each other by the main grooves. Among ribs coming into contact with ground under load, an outer contour of an outermost rib is made substantially discontinuous with respect to an outer contour of each of ribs adjoining the inside and outside of the outermost rib in the widthwise direction of the tire and is located at the inside of the outer contour of the adjoining ribs in the radial direction of the tire.
    Type: Grant
    Filed: July 27, 1979
    Date of Patent: April 21, 1981
    Assignee: Bridgestone Tire Co., Ltd.
    Inventors: Yukio Tadokoro, Kenji Matsumoto
  • Process for the preparation of diaminomaleonitrile
    Patent number: 3959344
    Abstract: In the preparation of diaminomaleonitrile by polymerization of hydrogen cyanide, the improvement which comprises employing, as a reaction solvent, at least one mononitrile compound selected from the group consisting of saturated aliphatic mononitriles containing 2 to 4 carbon atoms, methacrylonitrile and aromatic mononitriles.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: May 25, 1976
    Assignee: Nippon Chemicals Co., Ltd.
    Inventors: Yukio Tadokoro, Tadao Shirai, Satoshi Sogabe, Seikichi Yoshikawa