Patents by Inventor Kenzo Koizumi

Kenzo Koizumi 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).

  • Reactivity control arrangement and fast reactor
    Patent number: 7873137
    Abstract: A fast reactor including a reactivity control assembly including a reactor shutdown rod and neutron absorbers, a reactor shutdown rod drive mechanism, and units of neutron absorber drive mechanism. The reactor shutdown rod drive mechanism causes an inner extension tube to fall and release the reactor shutdown rod by a gripper section by turning off the power supply to a holding magnet at the time of scram. When grasping the neutron absorbers, an outer extension shaft is pulled up to allow both of the extension shafts to be inserted. After the outer extension tube gets to a handling head section of the neutron absorber, the outer extension shaft is pushed down to grasp the neutron absorber externally by latch fingers of the gripper section so that the neutron absorber can be moved up and down.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: January 18, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiyuki Suzuki, Koji Matsumoto, Kenzo Koizumi, Yasushi Tsuboi
  • REACTIVITY CONTROLLING APPARATUS AND FAST REACTOR
    Publication number: 20090175403
    Abstract: A fast reactor has a reactivity control assembly including a reactor shutdown rod of a backup reactor shutdown system and neutron absorbers to suppress the initial surplus reactivity, a reactor shutdown rod drive mechanism for releasing the reactor shutdown rod and units of neutron absorber drive mechanism capable of moving the respective neutron absorbers up and down. The reactor shutdown rod and the neutron absorbers are arranged in a wrapper tube. The reactor shutdown rod drive mechanism causes an inner extension tube to fall and release the reactor shutdown rod by means of a gripper section at the lowermost end of an outer extension tube by turning off the power supply to a holding magnet at the time of scram. Each of the units of neutron absorber drive mechanism has a dual tube type drive shaft including an outer extension shaft and an inner extension shaft. When grasping the neutron absorbers, the outer extension shaft is pulled up to allow both of the extension shafts to be inserted.
    Type: Application
    Filed: February 8, 2007
    Publication date: July 9, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Toshiyuki Suzuki, Koji Matsumoto, Kenzo Koizumi, Yasushi Tsuboi
  • Antirheumatic agent
    Patent number: 6743923
    Abstract: A novel antirheumatic agent comprising as an active ingredient a compound of formula I: or a pharmaceutically acceptable salt or hydrate thereof.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: June 1, 2004
    Assignee: Shionogi & Co., Ltd.
    Inventors: Saichi Matsumoto, Hirokuni Jyoyama, Shinji Kakudo, Kohji Hanasaki, Kenzo Koizumi, Tsuneaki Sakata, Ryuji Suzuki
  • Antirheumatic agent
    Publication number: 20030125364
    Abstract: A novel antirheumatic agent comprising as an active ingredient a compound of formula I: 1
    Type: Application
    Filed: December 4, 2002
    Publication date: July 3, 2003
    Inventors: Saichi Matsumoto, Hirokuni Jyoyama, Shinji Kakudo, Kohji Hanasaki, Kenzo Koizumi, Tsuneaki Sakata, Ryuji Suzuki
  • Antirheumatic
    Patent number: 6525081
    Abstract: A novel antirheumatic agent comprising as an active ingredient a compound of formula I: or a pharmaceutically acceptable salt or hydrate thereof.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: February 25, 2003
    Assignee: Shionogi & Co., Ltd.
    Inventors: Saichi Matsumoto, Hirokuni Jyoyama, Shinji Kakudo, Kohji Hanasaki, Kenzo Koizumi, Tsuneaki Sakata, Ryuji Suzuki
  • Immunosuppressive agent
    Patent number: 5314911
    Abstract: The present invention relates to a compound represented by the formula I: ##STR1## which was isolated from the culture of Streptomyces prunicolor PA-48153 and has biological activity such as immunosuppressive activity, antitumor activity and antifungal activity.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: May 24, 1994
    Assignee: Shionogi Seiyaku Kabushiki Kaisha
    Inventors: Tadashi Yoshida, Kenzo Koizumi, Yoshimi Kawamura, Koichi Matsumoto, Hiroshi Itazaki
  • Process for producing 6-aminopenicillanic acid and 6-aminopenicillanic acid S-oxide
    Patent number: 4370414
    Abstract: A process for producing 6-aminopenicillanic acid and 6-aminopenicillanic acid S-oxide by means of enzymes produced by microbes belonging to Arthrobacter genus, especially Arthrobacter cremorum and Arthrobacter flagellum.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: January 25, 1983
    Assignee: Shionogi & Co., Ltd.
    Inventors: Takashi Mitsugi, Ryonosuke Muneyuki, Yoshiharu Wakisaka, Kenzo Koizumi, Eiji Kondo