Patents by Inventor Tsutomu Akimaru

Tsutomu Akimaru 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).

  • Catalyst component for olefin polymerization and process for producing polyolefins
    Patent number: 5556820
    Abstract: A solid product as a catalyst component for an olefin polymerization catalyst is obtained by the reaction of metallic magnesium, an alcohol, and a halogen in an amount ranging from 0.019 to 0.06 gram-atom per one mole of metallic magnesium. Alternatively, the halogen component is a halogen-containing compound which contains not less than 0.0001 gram-atom of a halogen atom per one gram-atom of metallic magnesium.
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: September 17, 1996
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Hideo Funabashi, Akinobu Sugahara, Akira Tanaka, Masatoshi Toda, Tsuyoshi Ota, Youichi Matsuo, Tsutomu Akimaru, Sigeo Iwasaki, Masayuki Tsuruoka
  • Process for preparing ethylenic polymer composition
    Patent number: 5494982
    Abstract: A process for the preparation of an ethylenic polymer composition having excellent physical properties such as high impact properties, environmental stress cracking resistance, pinch-off fusing characteristics and having an intrinsic viscosity ranging from 3.2 to 4.5 dl/g and a density ranging from 0.943 g/cm.sup.3 to 0.958 g/cm.sup.3.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: February 27, 1996
    Assignee: Idemitsu Petrochemical Company, Limited
    Inventors: Kenji Nakacho, Norio Shimakura, Tsutomu Akimaru, Tsuyoshi Ohta, Hideo Funabashi, Isamu Yamamoto