Patents by Inventor Naoki Wakisaka

Naoki Wakisaka 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).

  • GENE EXPRESSION CASSETTE AND A TRANSFORMANT, AND A METHOD FOR MANUFACTURING 2-DEOXY-SCYLLO-INOSOSE AND A METHOD FOR PURIFYING 2-DEOXY-SCYLLO-INOSOSE USING SAID TRANSFORMANT
    Publication number: 20140256960
    Abstract: A transformant is prepared to insert at least a gene expression cassette comprising a gene involved in the synthesis of 2-deoxy-scyllo-inosose into E. coli as host cells. A 2-deoxy-scyllo-inosose is synthesized from D-glucose, oligosaccharide, polysaccharide, starch and rice bran, using the transformant. A culture solution containing the 2-deoxy-scyllo-inosose is treated with a mixed bed or double bed type column comprising a hydrogen form of strong acidic cation exchange resin and an organic ion form of basic anion exchange resin. The 2-deoxy-scyllo-inosose as purified is reacted with trimethoxymethane to convert into 2-deoxy-scyllo-inosose dimethylketal, and the dimethylketal is crystallized and purified. Then, DOI is highly purified through hydrolyzing the dimethylketal in the presence of acid.
    Type: Application
    Filed: February 12, 2014
    Publication date: September 11, 2014
    Applicants: MITSUI CHEMICALS, INC., NIIGATA BIO-RESEARCH PARK, INC.
    Inventors: Masamichi TAKAGI, Takahisa Kogure, Naoki Wakisaka, Hiroaki Takaku, Katsumi Ajisaka, Tatsuo Miyazaki, Masao Hirayama
  • Gene expression cassette and a transformant, and a method for manufacturing 2-deoxy-scyllo-inosose and a method for purifying 2-deoxy-scyllo-inosose using said transformant
    Patent number: 8758741
    Abstract: A transformant is prepared to insert at least a gene expression cassette comprising a gene involved in the synthesis of 2-deoxy-scyllo-inosose into E. coli as host cells. A 2-deoxy-scyllo-inosose is synthesized from D-glucose, oligosaccharide, polysaccharide, starch and rice bran, using the transformant. A culture solution containing the 2-deoxy-scyllo-inosose is treated with a mixed bed or double bed type column comprising a hydrogen form of strong acidic cation exchange resin and an organic ion form of basic anion exchange resin. The 2-deoxy-scyllo-inosose as purified is reacted with trimethoxymethane to convert into 2-deoxy-scyllo-inosose dimethylketal, and the dimethylketal is crystallized and purified. Then, DOI is highly purified through hydrolyzing the dimethylketal in the presence of acid.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: June 24, 2014
    Assignees: Mitsui Chemicals, Inc., Niigata Bio-Research Park, Inc.
    Inventors: Masamichi Takagi, Takahisa Kogure, Naoki Wakisaka, Hiroaki Takaku, Katsumi Ajisaka, Tatsuo Miyazaki, Masao Hirayama
  • Gene Expression Cassette and a Transformant, and a Method for Manufacturing 2-Deoxy-Scyllo-Inosose and a Method for Purifying 2-Deoxy-Scyllo-Inosose Using Said Transformant
    Publication number: 20100015672
    Abstract: A transformant is prepared to insert at least a gene expression cassette comprising a gene involved in the synthesis of 2-deoxy-scyllo-inosose into E. coli as host cells. A 2-deoxy-scyllo-inosose is synthesized from D-glucose, oligosaccharide, polysaccharide, starch and rice bran, using the transformant. A culture solution containing the 2-deoxy-scyllo-inosose is treated with a mixed bed or double bed type column comprising a hydrogen form of strong acidic cation exchange resin and an organic ion form of basic anion exchange resin. The 2-deoxy-scyllo-inosose as purified is reacted with trimethoxymethane to convert into 2-deoxy-scyllo-inosose dimethylketal, and the dimethylketal is crystallized and purified. Then, DOI is highly purified through hydrolyzing the dimethylketal in the presence of acid.
    Type: Application
    Filed: March 23, 2006
    Publication date: January 21, 2010
    Applicants: Niigata Bio-Research Center, Inc., Mitsui Chemicals, Inc.
    Inventors: Masamichi Takagi, Takahisa Kogure, Naoki Wakisaka, Hiroaki Takaku, Katsumi Ajisaka, Tatsuo Miyazaki, Masao Hirayama