Patents by Inventor Masayuki Kondoh

Masayuki Kondoh 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).

  • Polyethylene composition
    Patent number: 4792588
    Abstract: A polyethylene composition having excellent melt moldability which substantially comprises an ultrahigh-molecular-weight polyethylene having a molecular weight of, for example, at least about 1,650,000 and a low-molecular-weight to high-molecular-weight polyethylene having a molecular weight of, for example, about 1500 to about 360,000. The composition is produced by a multi-stage polymerization process involving a step of producing the ultrahigh-molecular-weight polyethylene and a step of producing the low-molecular-weight to high-molecular-weight polyethylene.
    Type: Grant
    Filed: April 17, 1987
    Date of Patent: December 20, 1988
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Michiharu Suga, Hideo Ishikawa, Yoshinori Akana, Junichi Yoshitake, Masayuki Kondoh