Patents by Inventor Tooru Takaki

Tooru Takaki 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).

  • Pyrazinone derivatives
    Patent number: 7148224
    Abstract: The present invention relates to a compound of the general formula (I): [Ar1 is aryl fused to the adjacent pyrazinone ring at the 5th and 6th positions, etc., X is CO, etc., Y is CH, etc., Z is CH, etc., V is CH, etc., Wn is —(CH2)n— (n is zero to four), R1, is H or optionally substituted lower alkyl, etc., R2 is H, etc., R3 and R4 are the same or different and are each H, etc., R5 and R6 are the same or different and are each H, hydroxy, etc.] or a pharmaceutically acceptable salt or ester thereof; a pharmaceutical composition, an inhibitor of Cdk4 and/or Cdk6 or an anti-cancer agent, containing the same as an active ingredient; and a process for preparing them.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: December 12, 2006
    Assignee: Banyu Pharmaceutical Co., Ltd.
    Inventors: Takashi Hayama, Nobuhiko Kawanishi, Tooru Takaki
  • Novel pyrazinone derivatives
    Publication number: 20050176719
    Abstract: The present invention relates to a compound of the general formula (I): [Ar1 is aryl fused to the adjacent pyrazinone ring at the 5th and 6th positions, etc., X is CO, etc., Y is CH, etc., Z is CH, etc., V is CH, etc., Wn is —(CH2)n— (n is zero to four), R1, is H or optionally substituted lower alkyl, etc., R2 is H, etc., R3 and R4 are the same or different and are each H, etc., R5 and R6 are the same or different and are each H, hydroxy, etc.] or a pharmaceutically acceptable salt or ester thereof; a pharmaceutical composition, an inhibitor of Cdk4 and/or Cdk6 or an anti-cancer agent, containing the same as an active ingredient; and a process for preparing them.
    Type: Application
    Filed: April 14, 2005
    Publication date: August 11, 2005
    Inventors: Takashi Hayama, Nobuhiko Kawanishi, Tooru Takaki
  • Pyrazinone derivatives
    Patent number: 6914062
    Abstract: The present invention relates to a compound of the general formula (I): [Ar1 is aryl fused to the adjacent pyrazinone ring at the 5th and 6th positions, etc., X is CO, etc., Y is CH, etc., Z is CH, etc., V is CH, etc., Wn is —(CH2)n— (n is zero to four), R1 is H or optionally substituted lower alkyl, etc., R2 is H, etc., R3 and R4 are the same or different and are each H, etc., R5 and R6 are the same or different and are each H, hydroxy, etc.] or a pharmaceutically acceptable salt or ester thereof; a pharmaceutical composition, an inhibitor of Cdk4 and/or Cdk6 or an anti-cancer agent, containing the same as an active ingredient; and a process for preparing them.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: July 5, 2005
    Assignee: Banyu Pharmaceutical Co., Ltd.
    Inventors: Takashi Hayama, Nobuhiko Kawanishi, Tooru Takaki
  • Novel pyrazinone derivatives
    Publication number: 20030203907
    Abstract: The present invention relates to a compound of the general formula (I): 1
    Type: Application
    Filed: January 31, 2003
    Publication date: October 30, 2003
    Inventors: Takashi Hayama, Nobuhiko Kawanishi, Tooru Takaki