Patents by Inventor Toshihiro Mizukami

Toshihiro Mizukami 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: 20230296522
    Abstract: Disclosed is a measurement apparatus for analyzing a cell contained in a specimen, comprising: a chamber for preparing a measurement sample in which the cell is stained with first and second fluorescent dyes contained in a reagent supplied from at least one reagent container; a liquid feeding section for feeding the reagent from the reagent container to the chamber via a liquid feeding tube provided between the reagent container and the chamber; and a detection section that acquires first and second signals each corresponding to fluorescence of a first wavelength and fluorescence of a second wavelength emitted from the cell stained with the first and second fluorescent dyes in response to irradiation of the measurement sample flowing in a flow cell with light; and an analysis section that analyzes the cell on the basis of the first and second signals.
    Type: Application
    Filed: March 13, 2023
    Publication date: September 21, 2023
    Applicant: SYSMEX CORPORATION
    Inventors: Toshihiro MIZUKAMI, Konobu KIMURA, Yuuichi HAMADA, Yuji TOYA, Noriyuki NAKANISHI, Takaaki NAGAI, Masato KUZE, Hironori TANAKA
  • Publication number: 20200326332
    Abstract: The present invention provides a method for classifying and counting leukocytes which allows classification and count of normal leukocytes as well as discrimination between blast cells and atypical lymphocytes. The present invention also provides a regent kit and reagent for classifying leukocyte which are used for classifying and counting leukocytes in biological samples.
    Type: Application
    Filed: June 29, 2020
    Publication date: October 15, 2020
    Applicant: SYSMEX CORPORATION
    Inventors: Saori Otsuka, Kazuki Hatcho, Toshihiro Mizukami, Shinichiro Oguni
  • Patent number: 9541542
    Abstract: Disclosed is a method of detecting filarial larvae in blood. The method comprises preparing a measurement sample from a blood sample collected from an animal; flowing the prepared measurement sample through a flow cell; irradiating light on the measurement sample flowing through the flow cell; detecting light given off from the irradiated measurement sample; and detecting filarial larvae contained in the measurement sample based on characteristic parameter of the detected light.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: January 10, 2017
    Assignee: SYSMEX CORPORATION
    Inventors: Seiichiro Tsuchiya, Toshihiro Mizukami, Hideki Hirayama, Noriaki Nakajima, Ken Nishikawa
  • Publication number: 20150185201
    Abstract: Disclosed is a method of detecting filarial larvae in blood. The method comprises preparing a measurement sample from a blood sample collected from an animal; flowing the prepared measurement sample through a flow cell; irradiating light on the measurement sample flowing through the flow cell; detecting light given off from the irradiated measurement sample; and detecting filarial larvae contained in the measurement sample based on characteristic parameter of the detected light.
    Type: Application
    Filed: December 26, 2014
    Publication date: July 2, 2015
    Inventors: Seiichiro TSUCHIYA, Toshihiro MIZUKAMI, Hideki HIRAYAMA, Noriaki NAKAJIMA, Ken NISHIKAWA
  • Patent number: 8802025
    Abstract: The present invention provides a reagent kit for analyzing a sample comprising a first reagent containing a cationic surfactant, a nonionic surfactant and an aromatic carboxylic acid and a second reagent containing a fluorescent dye capable of staining nucleic acid, and a method for analyzing a sample using the kit.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: August 12, 2014
    Assignee: Sysmex Corporation
    Inventors: Tatsuya Narikawa, Tomohiro Tsuji, Keiko Moriyama, Yuji Itose, Shinichiro Oguni, Ayumu Yoshida, Saori Suzuki, Toshihiro Mizukami
  • Publication number: 20140120530
    Abstract: The present invention provides a method for classifying and counting leukocytes which allows classification and count of normal leukocytes as well as discrimination between blast cells and atypical lymphocytes. The present invention also provides a regent kit and reagent for classifying leukocyte which are used for classifying and counting leukocytes in biological samples.
    Type: Application
    Filed: October 23, 2013
    Publication date: May 1, 2014
    Applicant: SYSMEX CORPORATION
    Inventors: Saori OTSUKA, Kazuki HATCHO, Toshihiro MIZUKAMI, Shinichiro OGUNI
  • Patent number: 8163471
    Abstract: A reagent for measuring basophils and/or nucleated red blood cells in a sample, which comprises at least one fluorescent dye defined in the formula (I) or (II) is disclosed. Also disclosed are a kit and method for measuring basophils and/or nucleated red blood cells.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: April 24, 2012
    Assignee: Sysmex Corporation
    Inventors: Toshihiro Mizukami, Hiroki Takeshita, Tatsuya Narikawa
  • Patent number: 8101414
    Abstract: A reagent for measuring a basophil and/or a nucleated red blood cell is described. The reagent comprises (a) an alcohol having 4 to 8 total carbon atoms, and (b) one or more fluorescent dyes selected from the group consisting of a compound of the general formula (I) and a compound of the general formula (II).
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: January 24, 2012
    Assignee: Sysmex Corporation
    Inventors: Toshihiro Mizukami, Hiroki Takeshita, Tatsuya Narikawa
  • Patent number: 7923229
    Abstract: A method for classifying and counting leukocytes, which comprises steps of: staining cells in a sample obtained from a hematological sample by treatment with a hemolytic agent, with a fluorescent dye; introducing the sample containing the stained cells into a flow cytometer to measure first scattered light, second scattered light different from the first scattered light and fluorescence of the respective cells; obtaining scattered light peak intensities and scattered light widths of the respective cells based on the measured first scattered light, obtaining scattered light intensities of the respective cells based on the measured second scattered light, and obtaining fluorescence intensities of the respective cells based on the measured fluorescence light; classifying the cells into a first group and a second group based on the scattered light peak intensities and the scattered light widths, the first group including leukocytes and second group including platelet clumps; classifying the leukocytes included in
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: April 12, 2011
    Assignee: Sysmex Corporation
    Inventors: Tomohiro Tsuji, Toshihiro Mizukami, Aya Konishi, Yusuke Mori, Yukie Nakazawa
  • Publication number: 20100330565
    Abstract: The present invention provides a reagent kit for analyzing a sample comprising a first reagent containing a cationic surfactant, a nonionic surfactant and an aromatic carboxylic acid and a second reagent containing a fluorescent dye capable of staining nucleic acid, and a method for analyzing a sample using the kit.
    Type: Application
    Filed: September 26, 2008
    Publication date: December 30, 2010
    Applicant: Sysmex Corporation
    Inventors: Tatsuya Narikawa, Tomohiro Tsuji, Keiko Moriyama, Yuji Itose, Shinichiro Oguni, Ayumu Yoshida, Saori Suzuki, Toshihiro Mizukami
  • Patent number: 7625730
    Abstract: There is provided a method for classifying and counting leukocytes with abnormal DNA amount, which comprises: (1) a step of staining cells in a sample obtained from a hematological sample by treatment with a hemolytic agent to lyse erythrocytes, with a fluorescent dye which can make a difference in the fluorescence intensity at least among mature leukocytes, leukocytes with abnormal DNA amount and immature leukocytes; (2) a step of introducing the sample containing the stained cells into a flow cytometer to measure scattered light and fluorescence of the respective cells; (3) a step of classifying leukocytes and coincidence cells/platelet clumps utilizing a difference in the intensity of a scattered light peak and a difference in the scattered light width; (4) a step of classifying and counting mature leukocytes, leukocytes with abnormal DNA amount and immature leukocytes, utilizing a difference in the scattered light intensity and a difference in the fluorescence intensity of leukocytes classified in the
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: December 1, 2009
    Assignee: Sysmex Corporation
    Inventors: Tomohiro Tsuji, Toshihiro Mizukami, Aya Konishi, Yusuke Mori, Yukie Nakazawa
  • Patent number: 7569373
    Abstract: A method for counting megakaryocytes in a specimen is described. In the method, first, erythrocytes in the specimen are lysed and nucleic acid in the megakaryocytes is stained with a fluorescent dye, and thereby, a measurement sample is prepared. Next, the cells in the measurement sample are irradiated with excited light so that the forward scattered light, the side scattered light and the fluorescence, which are emitted from the cells, are detected. Megakaryocytes are identified on the basis of the detected forward scattered light, the fluorescence and the side scattered light. Then, the identified megakaryocytes are counted.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: August 4, 2009
    Assignee: Sysmex Corporation
    Inventors: Yusuke Mori, Toshihiro Mizukami, Tomohiro Tsuji, Yoshiro Ikeuchi
  • Patent number: 7405082
    Abstract: Methods and devices are described for monitoring a therapeutic effect in a red blood cell-related disease by detecting the size of a reticulocyte using a full-automatic blood cell counting device.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: July 29, 2008
    Assignee: Sysmex Corporation
    Inventors: Toshihiro Mizukami, Yusuke Mori, Kanako Horisaka, Sunao Atogami
  • Publication number: 20080176274
    Abstract: 1.
    Type: Application
    Filed: October 29, 2007
    Publication date: July 24, 2008
    Applicant: SYSMEX CORPORATION
    Inventors: Tomohiro TSUJI, Toshihiro Mizukami, Aya Konishi, Yusuke Mori, Yukie Nakazawa
  • Publication number: 20070298408
    Abstract: A reagent for measuring a basophil and/or a nucleated red blood cell is described. The reagent comprises (a) an alcohol having 4 to 8 total carbon atoms, and (b) one or more fluorescent dyes selected from the group consisting of a compound of the general formula (I) and a compound of the general formula (II).
    Type: Application
    Filed: June 15, 2007
    Publication date: December 27, 2007
    Inventors: Toshihiro MIZUKAMI, Hiroki Takeshita, Tatsuya Narikawa
  • Publication number: 20070287145
    Abstract: A reagent for measuring basophils and/or nucleated red blood cells in a sample, which comprises at least one fluorescent dye defined in the formula (I) or (II) is disclosed. Also disclosed are a kit and method for measuring basophils and/or nucleated red blood cells.
    Type: Application
    Filed: June 5, 2007
    Publication date: December 13, 2007
    Applicant: Sysmex Corporation
    Inventors: Toshihiro Mizukami, Hiroki Takeshita, Tatsuya Narikawa
  • Publication number: 20060223138
    Abstract: A method for counting megakaryocytes in a specimen is described. In the method, first, erythrocytes in the specimen are lysed and nucleic acid in the megakaryocytes is stained with a fluorescent dye, and thereby, a measurement sample is prepared. Next, the cells in the measurement sample are irradiated with excited light so that the forward scattered light, the side scattered light and the fluorescence, which are emitted from the cells, are detected. Megakaryocytes are identified on the basis of the detected forward scattered light, the fluorescence and the side scattered light. Then, the identified megakaryocytes are counted.
    Type: Application
    Filed: March 30, 2006
    Publication date: October 5, 2006
    Inventors: Yusuke Mori, Toshihiro Mizukami, Tomohiro Tsuji, Yoshiro Ikeuchi
  • Publication number: 20050202400
    Abstract: There is provided a method for classifying and counting leukocytes with abnormal DNA amount, which comprises: (1) a step of staining cells in a sample obtained from a hematological sample by treatment with a hemolytic agent to lyse erythrocytes, with a fluorescent dye which can make a difference in the fluorescence intensity at least among mature leukocytes, leukocytes with abnormal DNA amount and immature leukocytes; (2) a step of introducing the sample containing the stained cells into a flow cytometer to measure scattered light and fluorescence of the respective cells; (3) a step of classifying leukocytes and coincidence cells/platelet clumps utilizing a difference in the intensity of a scattered light peak and a difference in the scattered light width; (4) a step of classifying and counting mature leukocytes, leukocytes with abnormal DNA amount and immature leukocytes, utilizing a difference in the scattered light intensity and a difference in the fluorescence intensity of leukocytes classified in the ste
    Type: Application
    Filed: June 23, 2003
    Publication date: September 15, 2005
    Inventors: Tomohiro Tsuji, Toshihiro Mizukami, Aya Konishi, Yusuke Mori, Yukie Nakazawa
  • Publication number: 20040132196
    Abstract: Methods and devices are described for monitoring a therapeutic effect in a red blood cell-related disease by detecting the size of a reticulocyte using a full-automatic blood cell counting device.
    Type: Application
    Filed: September 5, 2003
    Publication date: July 8, 2004
    Inventors: Toshihiro Mizukami, Yusuke Mori, Kanako Horisaka, Sunao Atogami
  • Patent number: 6177513
    Abstract: A method for evaluating an artificial receptor includes subjecting a functional monomer and a crosslinker in the presence of a template substance in a vessel into polymerization, thereby forming a resultant polymer with the template substance usually in the form of a thin film, dissociating the template substance from the polymer and removing it from the vessel by washing an inside of the vessel, thereby to prepare an artificial receptor, feeding a solution of the same or different template substance into the vessel to associate the template substance with the resulting polymer; then determining the amount of the template substance remaining in the vessel, and evaluating the artificial receptor on the basis of a determination result.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: January 23, 2001
    Assignees: Toshifumi Takeuchi, Sysmex Corporation
    Inventors: Toshifumi Takeuchi, Jun Matsui, Daigo Fukuma, Toshihiro Mizukami