Patents by Inventor Shigekazu Ema

Shigekazu Ema 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).

  • Method for injection molding of polyolefin containing inorganic filler
    Patent number: 4244910
    Abstract: A method for molding a resin composition comprising a polyolefin and an inorganic filler to form a thin molded article, which comprises shooting said resin composition into a mold at such a high speed that its flow rate at the gate portion of the mold is at least 100 meters per second, thereby reducing the occurrence of short shots and the occurrence of mold flashing and making possible molding within a shorter period of time.
    Type: Grant
    Filed: September 25, 1979
    Date of Patent: January 13, 1981
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Hiroshi Yui, Yoshihiro Sobajima, Ryoichi Ichikawa, Shigekazu Ema