Patents by Inventor Tugio Hashimoto

Tugio Hashimoto 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).

  • Surface improving method of polypropylene products for plating, joining or coating
    Patent number: 5837323
    Abstract: A method of improving the surface of polypropylene product characterized is that the surface of polypropylene product is improved by contacting with diluted fluorine gas of concentration of 0.1-10% for 1-30 minutes to make it hydrophilic with the surface contact angle 80 degrees or less.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: November 17, 1998
    Assignee: Hashimoto Chemical Co., Ltd.
    Inventors: Tugio Hashimoto, Matagoro Maeno, Ryoji Hirayama