Patents by Inventor Yuji Iizawa

Yuji Iizawa 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).

  • Preventives for hiv infection
    Publication number: 20050154016
    Abstract: It is intended to provide a novel drug which exhibits an excellent effect of preventing HIV infection in transfusing blood and using a blood preparation. This object can be achieved by a preventive for HIV infection in transfusing blood and using a blood prepartion characterized by containing a compound having an antagonism to a CC chemokine receptor (preferably antagonism to CCR5 and/or CCR2).
    Type: Application
    Filed: April 17, 2003
    Publication date: July 14, 2005
    Inventors: Katsunori Takashima, Yuji Iizawa, Mitsuru Shiraishi, Yoshihiro Sugihara, Masanori Baba
  • Phosphonocephem compound
    Patent number: 6906055
    Abstract: A cephem compound (particularly its crystal) represented by the formula [I], wherein X is CH3COOH, CH3CH2COOH or CH3CN, and n is 0 to 5, is useful as an antibacterial agent (particularly anti-MRSA agent) and shows superior quality such as high solid stability, possible long-term stable preservation and the like.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: June 14, 2005
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Tomoyasu Ishikawa, Shohei Hashiguchi, Yuji Iizawa
  • Bicyclic compound, production and use thereof
    Publication number: 20040259876
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof.
    Type: Application
    Filed: January 23, 2004
    Publication date: December 23, 2004
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
  • Benzazepine derivative, process for producing the same, and use
    Publication number: 20040235822
    Abstract: The present invention provides a novel benzazepine derivative represented by formula: 1
    Type: Application
    Filed: February 5, 2004
    Publication date: November 25, 2004
    Inventors: Mitsuru Shiraishi, Masanori Baba, Masaki Seto, Yoshio Aramaki, Naoyuki Kanzaki, Naoki Miyamoto, Yuji Iizawa
  • T cell line and use thereof
    Publication number: 20040043380
    Abstract: The present invention provides a T cell line carrying a reporter gene that contains an LTR sequence of HIV and expressing CCR5. This T cell line is suitable for use in an efficient screening method for efficiently finding out a medicine such as an anti-HIV agent.
    Type: Application
    Filed: May 8, 2003
    Publication date: March 4, 2004
    Inventors: Hiroshi Miyake, Yuji Iizawa, Masanori Baba
  • Phosphonocephem compound
    Publication number: 20040023943
    Abstract: A cephem compound (particularly its crystal) represented by the formula [I], wherein X is CH3COOH, CH3CH2COOH or CH3CN, and n is 0 to 5, is useful as an antibacterial agent (particularly anti-MRSA agent) and shows superior quality such as high solid stability, possible long-term stable preservation and the like.
    Type: Application
    Filed: January 29, 2003
    Publication date: February 5, 2004
    Inventors: Tomoyasu Ishikawa, Shohei Hashiguchi, Yuji Iizawa
  • HIV-producing cell line and uses thereof
    Publication number: 20030109023
    Abstract: The object of the present invention is to provide a T cell line capable of continuously producing human immunodeficiency virus (HIV) using CC chemokine receptor 5 (CCR5); and being in a state of continuously producing human immunodeficiency virus (HIV) or in a state wherein human immunodeficiency virus (HIV) is latently infecting, and a method for isolating and producing the T cell line.
    Type: Application
    Filed: November 4, 2002
    Publication date: June 12, 2003
    Inventors: Hiroshi Miyake, Yuji Iizawa, Masanori Baba
  • Phosphonocephem derivatives, process for the preparation of the same, and use thereof
    Patent number: 6417175
    Abstract: A novel cephem compound of the formula: wherein R1 is a phosphono group or a group convertible to a phosphono group; R2 is a hydrogen atom or a group having a linkage through a carbon atom; each of Q and X is a nitrogen atom or CH; Y is S, O or CH2; n is 0 or 1; one of R3 and R4 is a pyridinium group which may be substituted and the other is a hydrogen atom or hydrocarbon group which may be substituted, or R3 and R4 taken together may form a quaternalized nitrogen-containing heterocyclic ring which may be substituted, or its ester or its salt, which has a superior anti-bacterial activity, stability, absorbability, etc., a production thereof and a pharmaceutical composition containing it, is provided.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: July 9, 2002
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Tomoyasu Ishikawa, Shohei Hashiguchi, Yuji Iizawa