Patents by Inventor Hiromitsu Hatakeyama

Hiromitsu Hatakeyama 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).

  • Process for producing rubber-modified styrene resin, and resin composition
    Patent number: 5194491
    Abstract: The invention relates to an improved process for producing a rubber-modified styrene resin, and a rubber-modified styrene resin composition resulting therefrom, such resin having improved mechanical strength, impact resistance and high gloss, such being accomplished by producing a rubber-modified styrene resin containing substantially no rubber particle having a density of not higher than 0.96 gm/cm.sup.3 at 25.degree. C.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: March 16, 1993
    Assignee: Mitsubishi Monsanto Chemical Company
    Inventors: Takaaki Sakita, Minoru Uchida, Tetsuo Hayase, Hiromitsu Hatakeyama