Patents by Inventor Kazutaka Ikegashira

Kazutaka Ikegashira 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).

  • Azetidine compound and pharmaceutical use thereof
    Patent number: 8765739
    Abstract: Compounds of formula [I]: wherein each symbol is as defined in the description, or a pharmaceutically acceptable salts or solvates thereof.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: July 1, 2014
    Assignee: Japan Tobacco Inc.
    Inventors: Kazutaka Ikegashira, Taku Ikenogami, Naoki Ogawa, Tatsuya Matsumoto, Takahiro Oka, Takuya Matsuo, Takayuki Yamasaki
  • TETRACYCLIC FUSED HETEROCYCLIC COMPOUND AND USE THEREOF AS HCV POLYMERASE INHIBITOR
    Publication number: 20120070409
    Abstract: The present invention relates to a tetracyclic fused heterocyclic compound represented by the following formula [I] wherein each symbol is as defined in the specification, or a pharmaceutically acceptable a salt thereof, and a hepatitis C virus (HCV) polymerase inhibitor and a therapeutic agent for hepatitis C containing this compound. The compound of the present invention shows an anti-HCV activity based on the HCV polymerase inhibitory activity, and useful as an agent for the prophylaxis or treatment of hepatitis C.
    Type: Application
    Filed: February 3, 2011
    Publication date: March 22, 2012
    Applicant: Japan Tobacco Inc.
    Inventors: Takahiro Oka, Kazutaka Ikegashira, Shintaro Hirashima, Hiroshi Yamanaka, Satoru Noji, Yasushi Niwa, Yoko Matsumoto, Toshihiro Sato, Izuru Ando, Yukihiro Nomura
  • Tetracyclic fused heterocyclic compound and use thereof as HCV polymerase inhibitor
    Patent number: 7977331
    Abstract: The present invention relates to a tetracyclic fused heterocyclic compound represented by the following formula [I] wherein each symbol is as defined in the specification, or a pharmaceutically acceptable a salt thereof, and a hepatitis C virus (HCV) polymerase inhibitor and a therapeutic agent for hepatitis C containing this compound. The compound of the present invention shows an anti-HCV activity based on the HCV polymerase inhibitory activity, and useful as an agent for the prophylaxis or treatment of hepatitis C.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: July 12, 2011
    Assignee: Japan Tobacco Inc.
    Inventors: Takahiro Oka, Kazutaka Ikegashira, Shintaro Hirashima, Hiroshi Yamanaka, Satoru Noji, Yasushi Niwa, Yoko Matsumoto, Toshihiro Sato, Izuru Ando, Yukihiro Nomura
  • AZETIDINE COMPOUND AND PHARMACEUTICAL USE THEREOF
    Publication number: 20100331301
    Abstract: Compounds of formula [I]: wherein each symbol is as defined in the description, or a pharmaceutically acceptable salts or solvates thereof.
    Type: Application
    Filed: May 14, 2010
    Publication date: December 30, 2010
    Applicant: JAPAN TOBACCO INC.
    Inventors: Kazutaka Ikegashira, Taku Ikenogami, Naoki Ogawa, Tatsuya Matsumoto, Takahiro Oka, Takuya Matsuo, Takayuki Yamasaki
  • Tetracyclic fused heterocyclic compound and use thereof as HCV polymerase inhibitor
    Publication number: 20070049593
    Abstract: The present invention relates to a tetracyclic fused heterocyclic compound represented by the following formula [I] wherein each symbol is as defined in the specification, or a pharmaceutically acceptable a salt thereof, and a hepatitis C virus (HCV) polymerase inhibitor and a therapeutic agent for hepatitis C containing this compound. The compound of the present invention shows an anti-HCV activity based on the HCV polymerase inhibitory activity, and useful as an agent for the prophylaxis or treatment of hepatitis C.
    Type: Application
    Filed: February 23, 2005
    Publication date: March 1, 2007
    Applicant: Japan Tobacco Inc.
    Inventors: Takahiro Oka, Kazutaka Ikegashira, Shintaro Hirashima, Hiroshi Yamanaka, Satoru Noji, Yasushi Niwa, Yoko Matsumoto, Toshihiro Sato, Izuru Ando, Yukihiro Nomura