Patents by Inventor Ikuhiro Imaoka

Ikuhiro Imaoka 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).

  • Imidazolidine derivatives
    Patent number: 7803826
    Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, Q is A is cyano or the like; B is hydrogen, halogen, or the like; X1 and X2 are each independently selected from O and S; E is a C1-4 alkyl group; and R1, R2, R3 and R4 are each independently selected from a hydrogen atom and a C1-C6 alkyl group, and a drug, a pharmaceutical composition containing the compound, and the like.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: September 28, 2010
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
  • Novel Imidazolidine Derivatives
    Publication number: 20070249697
    Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, Q is A is cyano or the like; B is hydrogen, halogen, or the like; X1 and X2 are each independently selected from O and S; E is a C1-4 alkyl group; and R1, R2, R3 and R4 are each independently selected from a hydrogen atom and a C1-C6 alkyl group, and a drug, a pharmaceutical composition containing the compound, and the like.
    Type: Application
    Filed: August 3, 2005
    Publication date: October 25, 2007
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
  • Imidazolidine derivatives
    Patent number: 7271188
    Abstract: The present invention provides a compound represented by formula (I): [Formula 1] wherein n is an integer selected from 1 to 20, and R1 and R2, which may be the same or different, each represent a hydrogen atom, or a linear or branched C1-C6 alkyl group, or a salt, a prodrug or a solvate thereof, as well as a drug, a pharmaceutical composition containing the compound, and the like.
    Type: Grant
    Filed: June 11, 2004
    Date of Patent: September 18, 2007
    Assignee: Chugai Seikayu Kabushiki Kaisha
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
  • Imidazolidine derivatives
    Publication number: 20060135583
    Abstract: The present invention provides a compound represented by formula (I): wherein n is an integer selected from 1 to 20, and R1 and R2, which may be the same or different, each represent a hydrogen atom, or a linear or branched C1-C6 alkyl group, or a salt, a prodrug or a solvate thereof, as well as a drug, a pharmaceutical composition containing the compound, and the like.
    Type: Application
    Filed: June 11, 2004
    Publication date: June 22, 2006
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazutaka Tachibana, Haruhiko Sato, Masateru Ohta, Mitsuaki Nakamura, Takuya Shiraishi, Ikuhiro Imaoka, Hitoshi Yoshino, Masahiro Nagamuta, Hiromitsu Kawata
  • Androstane derivative having substituent in 7- abd 17--positions
    Publication number: 20050009797
    Abstract: A compound of Formula (I): [wherein R1 represents a lower alkyl group, X represents an oxygen atom or a methylene group, m represents an integer of 1 to 10, and n represents an integer of 0 to 5] or a salt or ester thereof; a medicament and a pharmaceutical composition comprising one or more such compounds; a method for preventing or treating a disease closely related to androgen, which comprises administering an effective amount of one or more such compounds; a kit used for such prevention or treatment; and the use of one or more such compounds for the manufacture of the medicament.
    Type: Application
    Filed: December 19, 2002
    Publication date: January 13, 2005
    Inventors: Mitsuaki Nakamura, Kazutaka Tachibana, Ikuhiro Imaoka, Hitoshi Yoshino, Setsu Kawata