Patents by Inventor Yosihiro Yoshimura

Yosihiro Yoshimura 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).

  • Flexible tube of thermoplastic resin having poor melt flowability and production method and apparatus thereof
    Patent number: 4938908
    Abstract: Disclosed is a method and apparatus for producing a flexible tube of a thermoplastic resin having poor melt flowability by melting a thermoplastic resin having poor melt flowability in a screw extruder, and melt-extruding the molten thermoplastic resin from a tube die having an L/D of 30-70 provided at a mandrel rotatable with the rotation of the screw.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: July 3, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Takeshi Shiraki, Yosihiro Yoshimura