Patents by Inventor Hayato Ishihara

Hayato Ishihara 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 purifying fructose 1,6-diphosphate
    Patent number: 5434255
    Abstract: A process for the purification of fructose 1,6-diphosphate which comprises subjecting a fructose 1,6-diphosphate-containing solution to anion exchange column chromatography to separate fructose 1,6-diphosphate therefrom, and subsequently subjecting the resulting FDP fraction to a desalting treatment, so as to provide a highly purified FDP preparation useful as a pharmaceutical drug and the like in a high yield.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: July 18, 1995
    Assignee: Unitika Ltd.
    Inventors: Tatsuo Katayama, Hayato Ishihara, Kenji Okada, Masaaki Onda, Hiroshi Nakajima
  • Process for producing fructose-1,6-diphosphate
    Patent number: 5094947
    Abstract: A process for producing fructose-1,6-diphosphate comprising the steps of: (a) enzymatically converting adenosine 5'-diphosphate to adenosine 5'-triphosphate using an acetate kinase-containing microorganism or an extract of the microorganism and phosphate donor; and (b) enzymatically converting a substrate capable of being converted to glucose or fructose to fructose-1,6-diphosphate using the adenosine 5'-triphosphate resulting from step (a) and the acetate kinase-containing microorganism or the extract of the microorganism.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: March 10, 1992
    Assignee: Unitika, Ltd.
    Inventors: Hiroshi Nakajima, Masaaki Onda, Ryoichi Turutani, Hayato Ishihara