Patents by Inventor Ryuji Maekawa

Ryuji Maekawa 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).

  • Publication number: 20210032302
    Abstract: A method for detecting an antigen-specific antibody detection reagent, which includes a cationized, denatured antigenic protein immobilized on a solid-phase surface of a carrier material, is provided. The cationized, denatured antigenic protein has cationized SH groups formed from reaction with a cationizing agent. The detection reagent is capable of specifically binding to an antigen-specific antibody which binds to an epitope of the antigenic protein. The method includes contacting a sample containing the antigen-specific antibody with the detection reagent to bind the antigen-specific antibody with the detection reagent. A labeled secondary antibody is then added to allow the labeled secondary antibody to bind to the antigen-specific antibody; and the detection reagent bound with the antigen-specific antibody is detected.
    Type: Application
    Filed: September 23, 2020
    Publication date: February 4, 2021
    Applicants: Junichiro FUTAMI, Medinet Co., Ltd.
    Inventors: Junichiro FUTAMI, Kazuhiro KAKIMI, Ryuji MAEKAWA, Masato SHIRAKI
  • Patent number: 10822384
    Abstract: The present invention provides the following: a method for efficiently producing a reagent for detecting an antibody that specifically binds with an insoluble antigen protein present in a liquid sample; a reagent for antibody detection produced by the production method; and a use of the antibody. In a step for solubilizing an antigen protein, it is possible to efficiently solubilize and recover the antigen protein by using a cationizing agent; therefore, when compared to conventional methods, it is possible to efficiently produce a reagent for detecting an antibody that has bound to multiple antigen protein molecules in a carrier.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: November 3, 2020
    Assignees: Medinet Co., Ltd.
    Inventors: Junichiro Futami, Kazuhiro Kakimi, Ryuji Maekawa, Masato Shiraki
  • Publication number: 20150064801
    Abstract: The present invention provides the following: a method for efficiently producing a reagent for detecting an antibody that specifically binds with an insoluble antigen protein present in a liquid sample; a reagent for antibody detection produced by the production method; and a use of the antibody. In a step for solubilizing an antigen protein, it is possible to efficiently solubilize and recover the antigen protein by using a cationizing agent; therefore, when compared to conventional methods, it is possible to efficiently produce a reagent for detecting an antibody that has bound to multiple antigen protein molecules in a carrier.
    Type: Application
    Filed: March 29, 2013
    Publication date: March 5, 2015
    Inventors: Junichiro Futami, Kazuhiro Kakimi, Ryuji Maekawa, Masato Shiraki
  • Publication number: 20040122066
    Abstract: A pharmaceutical composition for treating or preventing cancer containing a compound of the general formula (I), a prodorug, a pharmaceutically acceptable salt, or a solvate thereof as an active ingredient: 1
    Type: Application
    Filed: December 10, 2003
    Publication date: June 24, 2004
    Inventors: Takayuki Yoshioka, Ryuji Maekawa, Fumihiko Watanabe
  • Patent number: 6720343
    Abstract: A pharmaceutical composition for treating or preventing cancer containing a compound of the general formula (I), a prodrug, a pharmaceutically acceptable salt, or a solvate thereof as an active ingredient: wherein R1 is hydroxy or the like; R2 is optionally substituted lower alkyl or the like; R3 is hydrogen or the like; R4 is optionally substituted arylene or the like; R5 is optionally substituted aryl or the like.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: April 13, 2004
    Assignee: Shionogi & Co., Ltd.
    Inventors: Takayuki Yoshioka, Ryuji Maekawa, Fumihiko Watanabe
  • Publication number: 20030203940
    Abstract: A pharmaceutical composition for treating or preventing cancer containing a compound of the general formula (I), a prodorug, a pharmaceutically acceptable salt, or a solvate thereof as an active ingredient: 1
    Type: Application
    Filed: October 18, 2002
    Publication date: October 30, 2003
    Inventors: Takayuki Yoshioka, Ryuji Maekawa, Fumihiko Watanabe
  • Patent number: 6627411
    Abstract: A method for checking a matrix metalloproteinase-inhibitory activity present in a mammal that has received a compound exhibiting matrix metalloproteinase-inhibitory activity, which comprises utilizing in situ zymography, is provided.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: September 30, 2003
    Assignees: Shionogi & Co., Ltd., Fuji Photo Film Co., Ltd.
    Inventors: Ryuji Maekawa, Takayuki Yoshioka, Rhoichi Nemori, Yutaka Tamura
  • Publication number: 20030157585
    Abstract: A method for checking a matrix metalloproteinase-inhibitory activity present in a mammal that has received a compound exhibiting matrix metalloproteinase-inhibitory activity, which comprises utilizing in situ zymography, is provided.
    Type: Application
    Filed: February 28, 2002
    Publication date: August 21, 2003
    Inventors: Ryuji Maekawa, Takayuki Yoshioka, Rhoichi Nemori, Yutaka Tamura