Patents by Inventor Takafumi Kasumi

Takafumi Kasumi 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).

  • Erythrose reductase, its cDNA and cell which the cDNA express
    Patent number: 6960458
    Abstract: Protein having an erythrose reductase activity; a DNA encoding the protein; a cell to which a DNA has been transferred in a manner such that the DNA is capable of expressing an erythrose reductases type III, II or I the DNA encodes; and a method for producing erythritol, comprising acting the erythrose reductases type III, II or I or a cell to which erythrose reductases type III, II or I has been transferred in a manner capable of expressing the erythrose reductases type III, II or I on D-erythrose and harvesting the produced erythritol.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: November 1, 2005
    Assignee: Director of National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries
    Inventors: Tetuya Ookura, Takafumi Kasumi, Eiji Asaba
  • Erythrose reductase, its cDNA and cell which the cDNA express
    Publication number: 20050233430
    Abstract: Protein having an erythrose reductase activity; a DNA encoding the protein; a cell to which a DNA has been transferred in a manner such that the DNA is capable of expressing an erythrose reductases type III, II or I the DNA encodes; and a method for producing erythritol, comprising acting the erythrose reductases type III, II or I or a cell to which erythrose reductases type III, II or I has been transferred in a manner capable of expressing the erythrose reductases type III, II or I on D-erythrose and harvesting the produced erythritol.
    Type: Application
    Filed: May 10, 2005
    Publication date: October 20, 2005
    Applicant: Director of National Food Research Institute
    Inventors: Tetuya Ookura, Takafumi Kasumi, Eiji Asaba
  • Erythrose reductase, its cDNA and cell which the cDNA express
    Publication number: 20020160480
    Abstract: Protein having an erythrose reductase activity; a DNA encoding the protein; a cell to which a DNA has been transferred in a manner such that the DNA is capable of expressing an erythrose reductases type III, II or I the DNA encodes; and a method for producing erythritol, comprising acting the erythrose reductases type III, II or I or a cell to which erythrose reductases type III, II or I has been transferred in a manner capable of expressing the erythrose reductases type III, II or I on D-erythrose and harvesting the produced erythritol.
    Type: Application
    Filed: January 9, 2002
    Publication date: October 31, 2002
    Applicant: DIRECTOR OF NATIONAL FOOD RESEARCH INSTITUTE
    Inventors: Tetuya Ookura, Takafumi Kasumi, Eiji Asaba
  • Erythrose reductase, its cDNA and cell which the cDNA express
    Publication number: 20020127677
    Abstract: A protein shown in (A) or (B) below:
    Type: Application
    Filed: March 8, 2001
    Publication date: September 12, 2002
    Applicant: Director of National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries
    Inventors: Tetuya Ookura, Takafumi Kasumi, Eiji Asaba
  • Process for isomerization of compound of aldose structure into compound of ketose structure, and isomerization agent or accelerator used therin
    Patent number: 5877311
    Abstract: A process is provided which comprises isomerizing a compound having a ketose structure by the use of or in the presence of an organogermanium compound having a structural portion represented by formula (I): ##STR1## Due to the use or presence of the organogermanium compound, the process is free from the problems of the prior art, and is capable of isomerizing a compound having an aldose structure into a compound having a ketose structure at a high isomerization ratio without requiring any special apparatus or any complicated operation.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: March 2, 1999
    Assignees: National Food Research Institute, Ministry of Agriculture, Forestry & Fisheries, Asai Germanium Research Institute Co., Ltd.
    Inventors: Keiji Umeda, Norihiro Kakimoto, Takafumi Kasumi
  • Process for isomerization of compound of aldose structure into compound of ketose structure, and isomerization agent or accelerator used therein
    Patent number: 5679787
    Abstract: A process is provided which comprises isomerizing a compound having a ketose structure by the use of or in the presence of an organogermanium compound having a structural portion represented by formula (I): ##STR1## Due to the use or presence of the organogermanium compound, the process is free from the problems of the prior art, and is capable of isomerizing a compound having an aldose structure into a compound having a ketose structure at a high isomerization ratio without requiring any special apparatus or any complicated operation.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: October 21, 1997
    Assignees: National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, Asai Ermanium Research Institute Co., Ltd.
    Inventors: Keiji Umeda, Norihiro Kakimoto, Takafumi Kasumi
  • Novel Aureobasidium sp. microorganisms and method for obtaining the same, and method for preparing erythritol with the same
    Patent number: 5036011
    Abstract: Biologically pure culture of Aureobasidium sp. SN-124A strain (FERM BP-1429) and artificial mutants thereof according to the present invention show the properties of forming and accumulating erythritol in a culture solution, when aerobically cultured on a liquid culture medium containing an assimilable carbon source and an assimilable nitrogen source, and are useful for the preparation of erythritol by fermentation of sugars. A method for preparing erythritol by fermentation of sugars according to the present invention comprises inoculating microorganism selected from the group consisting of Aureobasidium sp. SN-124A strain (FERM BP-1429) and mutants thereof on a liquid culture medium of pH 4 to 9 containing an assimilable carbon source and an assimilable nitrogen source, and aerobically culturing them at a temperature of 30.degree. to 38.degree. C. to form and accumulate erythritol in said culture medium for collection.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: July 30, 1991
    Assignees: Director of National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, Nikken Chemicals Co., Ltd.
    Inventors: Takashi Sasaki, Takafumi Kasumi, Naoya Kubo, Keiji Kainuma, Katsuo Wako, Hiroaki Ishizuka, Gaku Kawaguchi, Tsunero Oda
  • Novel auerobasidium sp. microorganisms, method for obtaining the same and method for preparing erythritol with the same
    Patent number: 4939091
    Abstract: Biologically pure culture of Aureobasidium sp. SN-124A strain (FERM BP-1429) and artificial mutants thereof according to the present invention show the properties of forming and accumulating erythritol in a culture solution, when aerobically cultured on a liquid culture medium containing an assimilable carbon source and an assimilable nitrogen source, and are useful for the preparation of erythritol by fermentation of sugars. A method for preparing erythritol by fermentation of sugars according to the present invention comprises inoculating microorganism selected from the group consisting of Aureobasidium sp. SN-124A strain (FERM BP-1429) and mutants thereof on a liquid culture medium of pH 4 to 9 containing an assimilable carbon source and an assimilable nitrogen source, and aerobically culturing them at a temperature of 30.degree. to 38.degree. C. to form and accumulate erythritol in said culture medium for collection.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: July 3, 1990
    Assignees: Director of National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, Nikken Chemicals Co., Ltd.
    Inventors: Takashi Sasaki, Takafumi Kasumi, Naoya Kubo, Keiji Kainuma, Katsuo Wako, Hiroaki Ishizuka, Gaku Kawaguchi, Tsunero Oda
  • Method of isomerizing glucose with enzyme immobilized within microbial cell
    Patent number: 4001082
    Abstract: A method of isomerizing glucose with an enzyme immobilized within a microbial cell has been developed. The immobilized enzyme is prepared by dipping a microbial cell containing glucose isomerase in an aqueous solution containing citric acid and drying it, if necessary. An immobilization of an intracellular enzyme is reinforced by supplemental means such as radiation or others.
    Type: Grant
    Filed: February 26, 1976
    Date of Patent: January 4, 1977
    Assignee: Director of National Food Research Institute
    Inventors: Nobuzo Tsumura, Takafumi Kasumi