Patents by Inventor Atsuko Sawai

Atsuko Sawai 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).

  • Propylene base polymer and a polypropylene film using the same
    Patent number: 6489426
    Abstract: Propylene homopolymers or propylene-olefin copolymers, having at least one olefin selected from ethylene and &agr;-olefins having 4 or more carbon atoms where the propylene content in this copolymer is 98% by weight or more, are provided that are suitable for producing films with excellent antistatic performance, high rigidity and metallizability.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: December 3, 2002
    Assignee: Chisso Corporation
    Inventors: Naoshi Kawamoto, Yasuhiro Shiraishi, Atsuko Sawai, Yuji Ando, Shinji Nakata, Hisanobu Minamizawa, Ichiro Sakabe, Katsuhiko Ohno