Patents by Inventor Hisaharu Masaki

Hisaharu Masaki 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).

  • D-Glucaric Acid Producing Bacterium, and Method for Manufacturing D-Glucaric Acid
    Publication number: 20210254109
    Abstract: The present invention provides a D-glucaric acid-producing bacterium and a method for producing D-glucaric acid. The present invention is characterized in that D-glucaric acid or a salt thereof is produced from one or more saccharides selected from the group consisting of D-glucose, D-gluconic acid and D-glucuronic acid with catalytic action of a specific alcohol dehydrogenase PQQ-ADH (1) and a specific aldehyde dehydrogenase PQQ-ALDH (2), and that D-glucaric acid or a salt thereof is produced by using a microorganism having the PQQ-ADH (1) and the PQQ-ALDH (2) or a processed product thereof in the presence of the one or more saccharides. The present invention can provide a microorganism having improved productivity of D-glucaric acid to be used for production of D-glucaric acid and a method for efficiently producing D-glucaric acid.
    Type: Application
    Filed: March 4, 2021
    Publication date: August 19, 2021
    Inventors: Tetsuya Ito, Hiroki Tadokoro, Hisaharu Masaki, Katsuhiko Mikuni, Hiromi Murakami, Taro Kiso, Takaaki Kiryu
  • D-glucaric acid producing bacterium, and method for manufacturing D-glucaric acid
    Patent number: 10975396
    Abstract: The present invention provides a D-glucaric acid-producing bacterium and a method for producing D-glucaric acid. The present invention is characterized in that D-glucaric acid or a salt thereof is produced from one or more saccharides selected from the group consisting of D-glucose, D-gluconic acid and D-glucuronic acid with catalytic action of a specific alcohol dehydrogenase PQQ-ADH (1) and a specific aldehyde dehydrogenase PQQ-ALDH (2), and that D-glucaric acid or a salt thereof is produced by using a microorganism having the PQQ-ADH (1) and the PQQ-ALDH (2) or a processed product thereof in the presence of the one or more saccharides. The present invention can provide a microorganism having improved productivity of D-glucaric acid to be used for production of D-glucaric acid and a method for efficiently producing D-glucaric acid.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: April 13, 2021
    Assignees: Ensuiko Sugar Refining Co., Ltd., Osaka Research Institute of Industrial Science and Technology
    Inventors: Tetsuya Ito, Hiroki Tadokoro, Hisaharu Masaki, Katsuhiko Mikuni, Hiromi Murakami, Taro Kiso, Takaaki Kiryu
  • Polymer having aldaric acid as constitutional unit and method for producing same
    Patent number: 10913821
    Abstract: The present invention relates to a high molecular weight polymer having an aldaric acid as a constitutional unit, and a method for producing the same, and more specifically, relates to a thermoplastic polymer which comprises at least one repeating unit derived from an aldaric acid, and has a weight average molecular weight of 3,800 or more.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: February 9, 2021
    Assignees: ENSUIKO SUGAR REFINING CO., LTD., THE UNIVERSITY OF TOKYO
    Inventors: Tadahisa Iwata, Yukiko Rogers, Yuxin Wu, Hisaharu Masaki, Tetsuya Ito, Koji Hara
  • NOVEL POLYMER HAVING ALDARIC ACID AS CONSTITUTIONAL UNIT AND METHOD FOR PRODUCING SAME
    Publication number: 20190100621
    Abstract: The present invention relates to a high molecular weight polymer having an aldaric acid as a constitutional unit, and a method for producing the same, and more specifically, relates to a thermoplastic polymer which comprises at least one repeating unit derived from an aldaric acid, and has a weight average molecular weight of 3,800 or more.
    Type: Application
    Filed: March 29, 2017
    Publication date: April 4, 2019
    Applicants: THE UNIVERSITY OF TOKYO, ENSUIKO SUGAR REFINING CO., LTD.
    Inventors: Tadahisa IWATA, Yukiko ROGERS, Yuxin WU, Hisaharu MASAKI, Tetsuya ITO, Koji HARA
  • D-Glucaric Acid Producing Bacterium, and Method for Manufacturing D-Glucaric Acid
    Publication number: 20150152448
    Abstract: The present invention provides a D-glucaric acid-producing bacterium and a method for producing D-glucaric acid. The present invention is characterized in that D-glucaric acid or a salt thereof is produced from one or more saccharides selected from the group consisting of D-glucose, D-gluconic acid and D-glucuronic acid with catalytic action of a specific alcohol dehydrogenase PQQ-ADH (1) and a specific aldehyde dehydrogenase PQQ-ALDH (2), and that D-glucaric acid or a salt thereof is produced by using a microorganism having the PQQ-ADH (1) and the PQQ-ALDH (2) or a processed product thereof in the presence of the one or more saccharides. The present invention can provide a microorganism having improved productivity of D-glucaric acid to be used for production of D-glucaric acid and a method for efficiently producing D-glucaric acid.
    Type: Application
    Filed: June 3, 2013
    Publication date: June 4, 2015
    Inventors: Tetsuya Ito, Hiroki Tadokoro, Hisaharu Masaki, Katsuhiko Mikuni, Hiromi Murakami, Taro Kiso, Takaaki Kiryu