Patents by Inventor Tadanori Jyunke

Tadanori Jyunke 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 ?-olefin polymer
    Patent number: 6870022
    Abstract: An ?-olefin polymer having extremely high stereoregularity, exhibiting excellent fluidity and containing a decreased amount of catalyst residues in the polymer can be obtained industrially advantageously in accordance with a process for producing an ?-olefin polymer which comprises homopolymerizing an ?-olefin or copolymerizing two or more ?-olefins in the presence of (A) a solid catalyst component comprising magnesium, titanium and a halogen, (B) an organoaluminum compound having a content of hydroaluminum compounds of 0.1% by weight or smaller and (C) an organozinc compound.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: March 22, 2005
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Takeshi Iwasaki, Tadanori Jyunke, Kiyokazu Katayama, Kenji Tanaka
  • Process for producing a-olefin polymer
    Publication number: 20040030068
    Abstract: An &agr;-olefin polymer having extremely high stereoregularity, exhibiting excellent fluidity and containing a decreased amount of catalyst residues in the polymer can be obtained industrially advantageously in accordance with a process for producing an &agr;-olefin polymer which comprises homopolymerizing an &agr;-olefin or copolymerizing two or more &agr;-olefins in the presence of (A) a solid catalyst component comprising magnesium, titanium and a halogen, (B) an organoaluminum compound having a content of hydroaluminum compounds of 0.1% by weight or smaller and (C) an organozinc compound.
    Type: Application
    Filed: February 4, 2003
    Publication date: February 12, 2004
    Inventors: Takeshi Iwasaki, Tadanori Jyunke, Kiyokazu Katayama, Kenji Tanaka