Patents by Inventor Maya IGUCHI

Maya IGUCHI 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).

  • Crystal of reduced glutathione and method for producing same
    Patent number: 10858393
    Abstract: According to the present invention, a crystal of reduced glutathione having a reduced content of impurities, particularly L-cysteinyl-L-glycine and a method for producing the same are provided. The present invention relates to a crystal of reduced glutathione, wherein, in a high-performance liquid chromatography (HPLC) analysis, the peak area of L-cysteinyl-L-glycine is 0.02 or less with respect to the peak area of reduced glutathione which is taken as 100.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: December 8, 2020
    Assignee: KYOWA HAKKO BIO CO., LTD.
    Inventors: Kazunari Fukumoto, Maya Iguchi, Hiroshi Nagano
  • CRYSTAL OF REDUCED GLUTATHIONE AND METHOD FOR PRODUCING SAME
    Publication number: 20200369721
    Abstract: The present invention provides a crystal of reduced glutathione having excellent powder properties and a method for producing the same. The present invention relates to a crystal of reduced glutathione, wherein the average crystal thickness is 10 ?m or more.
    Type: Application
    Filed: August 7, 2020
    Publication date: November 26, 2020
    Applicant: KYOWA HAKKO BIO CO., LTD.
    Inventors: Kazunari FUKUMOTO, Maya IGUCHI, Hiroshi NAGANO
  • Crystal of reduced glutathione and method for producing same
    Patent number: 10774109
    Abstract: The present invention provides a crystal of reduced glutathione having excellent powder properties and a method for producing the same. The present invention relates to a crystal of reduced glutathione, wherein the average crystal thickness is 10 ?m or more.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: September 15, 2020
    Assignee: KYOWA HAKKO BIO CO., LTD.
    Inventors: Kazunari Fukumoto, Maya Iguchi, Hiroshi Nagano
  • Method for producing alpha-form crystal of reduced glutathione, and method for storing said crystal
    Patent number: 10407463
    Abstract: The invention provides a method of efficiently and stably producing ?-form crystal of reduced glutathione, and a preservation method thereof. According to the invention, development of ?-form crystal and/or transition to ?-form crystal of reduced glutathione are suppressed by the coexistence of at least one kind of compound selected from the group of aliphatic amino acid, sulfur-containing amino acid, aromatic amino acid, an analogous compound and dipeptide, as a habit modifier, during production and preservation of an aqueous solution or ?-form crystal of reduced glutathione.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: September 10, 2019
    Assignee: KYOWA HAKKO BIO CO., LTD.
    Inventors: Maya Iguchi, Kazunari Fukumoto, Hiroshi Nagano
  • CRYSTAL OF REDUCED GLUTATHIONE AND METHOD FOR PRODUCING SAME
    Publication number: 20190085023
    Abstract: The present invention provides a crystal of reduced glutathione having excellent powder properties and a method for producing the same. The present invention relates to a crystal of reduced glutathione, wherein the average crystal thickness is 10 ?m or more.
    Type: Application
    Filed: March 10, 2017
    Publication date: March 21, 2019
    Applicant: KYOWA HAKKO BIO CO., LTD.
    Inventors: Kazunari FUKUMOTO, Maya IGUCHI, Hiroshi NAGANO
  • CRYSTAL OF REDUCED GLUTATHIONE AND METHOD FOR PRODUCING SAME
    Publication number: 20190071466
    Abstract: According to the present invention, a crystal of reduced glutathione having a reduced content of impurities, particularly L-cysteinyl-L-glycine and a method for producing the same are provided. The present invention relates to a crystal of reduced glutathione, wherein, in a high-performance liquid chromatography (HPLC) analysis, the peak area of L-cysteinyl-L-glycine is 0.02 or less with respect to the peak area of reduced glutathione which is taken as 100.
    Type: Application
    Filed: March 10, 2017
    Publication date: March 7, 2019
    Applicant: KYOWA HAKKO BIO CO., LTD.
    Inventors: Kazunari FUKUMOTO, Maya IGUCHI, Hiroshi NAGANO
  • METHOD FOR PRODUCING ALPHA-FORM CRYSTAL OF REDUCED GLUTATHIONE, AND METHOD FOR STORING SAID CRYSTAL
    Publication number: 20180170959
    Abstract: The invention provides a method of efficiently and stably producing ?-form crystal of reduced glutathione, and a preservation method thereof. According to the invention, development of ?-form crystal and/or transition to ?-form crystal of reduced glutathione are suppressed by the coexistence of at least one kind of compound selected from the group of aliphatic amino acid, sulfur-containing amino acid, aromatic amino acid, an analogous compound and dipeptide, as a habit modifier, during production and preservation of an aqueous solution or ?-form crystal of reduced glutathione.
    Type: Application
    Filed: June 3, 2016
    Publication date: June 21, 2018
    Applicant: KYOWA HAKKO BIO CO., LTD.
    Inventors: Maya IGUCHI, Kazunari FUKUMOTO, Hiroshi NAGANO