Patents by Inventor Nobuharu Tujimoto

Nobuharu Tujimoto 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).

  • Mutant Escherichia coli capable of enhanced L-glutamic acid production
    Patent number: 5393671
    Abstract: The present invention provides a mutant and discloses a process for producing L-glutamic acid by fermentation using a microorganism belonging to the genus Escherichia. The L-glutamic acid is produced and accumulated in a culture medium by culturing a mutant designated as FERM P-12379 which is derived from Escherichia coli K-12 strain and the mutant is deficient or low in .alpha.-ketoglutaric acid dehydrogenase activity, has low L-glutamic acid decomposing ability, and is capable of producing L-glutamic acid.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: February 28, 1995
    Assignee: Ajinomoto Co., Inc.
    Inventors: Nobuharu Tujimoto, Yoshimi Kikuchi, Osamu Kurahashi, Yoshiko Kawahara
  • Mutant Escherichia coli capable of enhanced L-glutamic acid production by fermentation
    Patent number: 5378616
    Abstract: The present invention provides a mutant and a process for producing L-glutamic acid by fermentation using a microorganism belonging to the genus Escherichia. In the present process, L-glutamic acid is produced and accumulated in a culture medium by (A) culturing an Escherichia mutant which is deficient or low in .alpha.-ketoglutaric acid dehydrogenase activity, has low L-glutamic acid decomposing ability, and is capable of producing L-glutamic acid.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: January 3, 1995
    Assignee: Ajinomoto Co., Inc.
    Inventors: Nobuharu Tujimoto, Yoshimi Kikuchi, Osamu Kurahashi, Yoshiko Kawahara