Patents by Inventor Isamu Shiio

Isamu Shiio 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 the production of L-threonine by fermentation
    Patent number: 5077207
    Abstract: A process for the production of L-threonine, comprising cultivating a mutant bacterial species belonging to the genus Brevibacterium from which dihydrodipicolinate synthase has been deleted or removed in a liquid medium; accumulating the L-threonine as a product of cultivation; and harvesting the L-threonine from the culture medium.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: December 31, 1991
    Assignee: Ajinomoto Co., Inc.
    Inventors: Isamu Shiio, Yasuhiko Toride, Atsushi Yokota, Shinichi Sugimoto, Kazue Kawamura
  • Process for the production of L-tryptophan using sulfaguanidine-resistant microorganisms
    Patent number: 4618580
    Abstract: A method for producing L-tryptophan by fermentation which comprises aerobically culturing in a culture medium a mutant of the genus Corynebacterium or genus Brevibacterium which is resistant to sulfaguanidine and capable of producing L-tryptophan, and recovering the L-tryptophan which has accumulated in the culture medium.
    Type: Grant
    Filed: April 13, 1984
    Date of Patent: October 21, 1986
    Assignee: Ajinomoto Company, Incorporated
    Inventors: Isamu Shiio, Shinichi Sugimoto, Kazue Kawamura
  • Method for producing L-tryptophan by fermentation with a brevibacterium flavum mutant
    Patent number: 4601982
    Abstract: A method for producing L-tryptophan by fermentation, which comprises, culturing aerobically in a culture medium a mutant of the genus Brevibacterium which is resistant to azaserine and tryptophan analogue and capable of producing L-tryptophan, and recovering the L-tryptophan which accumulates in the culture medium.
    Type: Grant
    Filed: April 12, 1982
    Date of Patent: July 22, 1986
    Assignee: Ajinomoto Company Incorporated
    Inventors: Isamu Shiio, Shinichi Sugimoto, Kazue Kawamura