Patents by Inventor Hisao Takemoto

Hisao Takemoto 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).

  • Process for preparation of aspartylphenylalanine alkyl esters
    Patent number: 4587214
    Abstract: .alpha.-L-aspartylphenylalanine lower alkyl esters are prepared by a process wherein fumaric acid, ammonia and a lower alkyl ester of L-phenylalanine are contacted with a culture or treated culture of a microorganism belonging to the genus Pseudomonas, and being capable of producing a .alpha.-L-aspartyl-L-phenylalanine lower alkyl ester from fumaric acid, ammonia and a lower alkyl ester of L-phenylalanine.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: May 6, 1986
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Tuneo Harada, Hisao Takemoto, Tatsuo Igarashi
  • Process for preparation of aspartylphenylalanine alkyl esters
    Patent number: 4506011
    Abstract: .alpha.-L-aspartylphenylalanine lower alkyl esters are prepared by a process wherein L-aspartic acid and a lower alkyl ester of L-phenylalanine are contacted with a culture or treated culture product of a microorganism belonging to the genus Pseudomonas, Alcaligenes, Torulopsis, Rhodotorula or Sporobolomyces and being capable of producing a .alpha.-L-aspartyl-L-phenylalanine lower alkyl ester from L-aspartic acid and a lower alkyl ester of L-phenylalanine.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: March 19, 1985
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Tsuneo Harada, Hisao Takemoto, Tatsuo Igarashi
  • Production of an allose-containing polysaccharide
    Patent number: 4425431
    Abstract: A new polysaccharide including allose as a constituent sugar and further characterized by galactose as a major constituent sugar is described. The polysaccharide is produced extracellularly by cultivation of Pseudomonas viscogena strains in nutrient medium.
    Type: Grant
    Filed: March 16, 1981
    Date of Patent: January 10, 1984
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Hisao Takemoto, Tatsuo Igarashi
  • Polysaccharides containing allose
    Patent number: 4312979
    Abstract: A new polysaccharide including allose as a constituent sugar and further characterized by galactose as a major constituent sugar is described. The polysaccharide is produced extracellularly by cultivation of Pseudomonas viscogena strains in nutrient medium.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: January 26, 1982
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Hisao Takemoto, Tatsuo Igarashi