Patents by Inventor Satoshi Hasaba

Satoshi Hasaba 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).

  • Compound, and method for measuring iron concentration by using novel compound as chelate color former
    Patent number: 9448244
    Abstract: The present invention addresses the problem of providing a chelate color former which can measure the concentration of iron with high sensitivity and with low blank values when measuring the concentration of iron, and an iron concentration measurement method and kit that use this chelate color former. The present invention relates to: a compound represented by following formula [1] or a salt thereof wherein, R1 and R2 each independently represent —SO3H or —CO2H; an iron concentration measurement method in which the compound is used as a chelate color former, the compound is brought into contact with iron in a sample, and the concentration of iron in the sample is measured on the basis of the degree of resulting color development; and a kit to be used therein.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: September 20, 2016
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Yoshikazu Fujita, Toshinari Ohashi, Naoyuki Yamamoto, Takashi Takagaki, Satoshi Hasaba
  • NOVEL COMPOUND, AND METHOD FOR MEASURING IRON CONCENTRATION BY USING NOVEL COMPOUND AS CHELATE COLOR FORMER
    Publication number: 20150260734
    Abstract: The present invention addresses the problem of providing a chelate color former which can measure the concentration of iron with high sensitivity and with low blank values when measuring the concentration of iron, and an iron concentration measurement method and kit that use this chelate color former. The present invention relates to: a compound represented by following formula [1] or a salt thereof wherein, R1 and R2 each independently represent —SO3H or —CO2H; an iron concentration measurement method in which the compound is used as a chelate color former, the compound is brought into contact with iron in a sample, and the concentration of iron in the sample is measured on the basis of the degree of resulting color development; and a kit to be used therein.
    Type: Application
    Filed: October 15, 2013
    Publication date: September 17, 2015
    Inventors: Yoshikazu Fujita, Toshinari Ohashi, Naoyuki Yamamoto, Takashi Takagaki, Satoshi Hasaba
  • Pyrazole-based cyanine dye
    Patent number: 8921124
    Abstract: PROBLEM Provided is a novel cyanine dye derivative with a pyrazole skeleton and an indole skeleton, having high sensitivity performance in a shorter wavelength region as compared with a conventional optical system, and showing high water solubility.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: December 30, 2014
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Matsuhiro Date, Satoshi Hasaba, Naoyuki Yamamoto
  • Pyrazole-based cyanine dye containing quaternary ammonium cation
    Patent number: 8546586
    Abstract: A cyanine dye derivative having high fluorescence intensity in a short wavelength region, and also a controllable migration velocity by further introducing a quaternary ammonium cation.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: October 1, 2013
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Naoyuki Yamamoto, Tatsuo Kurosawa, Satoshi Hasaba, Matsuhiro Date
  • PYRAZOLE-BASED CYANINE DYE CONTAINING QUATERNARY AMMONIUM CATION
    Publication number: 20120046474
    Abstract: Problem Provided is a novel cyanine dye derivative having high fluorescence intensity in a short wavelength region, a structure where a pyrazole skeleton and an indole skeleton are bound to a polymethine chain, and also a controllable migration velocity by further introducing a quaternary ammonium cation into a molecule having said structure.
    Type: Application
    Filed: April 27, 2010
    Publication date: February 23, 2012
    Applicant: WAKO PURE CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoyuki Yamamoto, Tatsuo Kurosawa, Satoshi Hasaba, Matsuhiro Date
  • PYRAZOLE-BASED CYANINE DYE
    Publication number: 20090069546
    Abstract: Problem Provided is a novel cyanine dye derivative with a pyrazole skeleton and an indole skeleton, having high sensitivity performance in a shorter wavelength region as compared with a conventional optical system, and showing high water solubility.
    Type: Application
    Filed: March 30, 2007
    Publication date: March 12, 2009
    Applicant: WAKO PURE CHEMICAL INDUSTRIES, LTD.
    Inventors: Mutsuhiro Date, Satoshi Hasaba, Naoyuki Yamamoto