Patents by Inventor Seiichi Ikeyama

Seiichi Ikeyama 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).

  • Ethylene/pentene-1 copolymer, and ethylene/pentene-1 copolymer composition
    Patent number: 5290896
    Abstract: The present invention relates to a novel ethylene/pentene-1 copolymer whose molded film has a good balance between impact resistance and tear properties and high transparency, also is prominently reduced in a variation of the transparency even after subjected to a heat treatment, and further shows high blocking resistance, provided that the copolymer fulfills specific requisites. The invention also relates to a process for the preparation of the above-mentioned ethylene/pentene-1 copolymer and a formulation of the ethylene/pentene-1 copolymer composition using a stabilizer. According to the invention, there can be obtained an ethylene/pentene-1 copolymer composition which is excellent in heat stability in the molding stage, long-term heat stability and weatherability.
    Type: Grant
    Filed: February 27, 1991
    Date of Patent: March 1, 1994
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Mamoru Kioka, Tsuneo Yashiki, Takashi Ueda, Masaki Kohyama, Masaya Yamada, Seiichi Ikeyama, Yoshinori Akana, Kenji Iwata, Satoshi Matsumoto, Hideki Sakai