Patents by Inventor Tomoki Azuma

Tomoki Azuma 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 producing L-isoleucine by S-2-aminoethyl-L-cysteine or D-Serine resistant strains of E coli
    Patent number: 5460958
    Abstract: A process for the production of L-isoleucine using the microorganism, Escherichia coli H-8670 (FERM BP-4051) which has resistance to 0.2 g/l S-(2-aminoethyl)-L-cysteine or Escherichia coli H-8683 (FERM BP-4052) which has a resistance of 20 g/l of D-serine. The microorganism is cultured in a nutrient medium for a time and under conditions sufficient to produce L-isoleucine and the L-isoleucine is recovered from the medium.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: October 24, 1995
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Tetsuo Nakano, Tomoki Azuma, Yoshiyuki Kuratsu
  • Process for producing L-lysine by iodothyronine resistant strains of Mucorynebacterium glutamicum
    Patent number: 5302521
    Abstract: A process for producing L-lysine by fermentation includes the steps of culturing a microorganism belonging to the genus Corynebacterium having a resistance to iodothyronine in a nutrient medium to form and accumulate L-lysine in the resulting culture and recovering the L-lysine therefrom.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: April 12, 1994
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Tetsuo Nakano, Tomoki Azuma, Yoshiyuki Kuratsu
  • Process for producing L-arginine
    Patent number: 5034319
    Abstract: Disclosed is a process for producing L-arginine, which comprises culturing in a medium a coryneform glutamic acid-producing bacterium having resistance to cysteine or a cysteine analogue and an ability to produce L-arginine, accumulating L-arginine in the culture and recovering the L-arginine therefrom.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: July 23, 1991
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Tomoki Azuma, Seiji Aoyagi, Toshihide Nakanishi
  • Process for producing L-lysine by fermentation
    Patent number: 4623623
    Abstract: A process is disclosed for producing L-lysine by culturing a microorganism obtained by protoplast fusion and having an ability to produce L-lysine in a nutrient medium, forming and accumulating L-lysine in the resulting culture liquor, and recovering the L-lysine therefrom. Also, there are disclosed a number of microorganisms for producing L-lysine which are obtained by protoplast fusion.
    Type: Grant
    Filed: June 3, 1985
    Date of Patent: November 18, 1986
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Toshihide Nakanishi, Tomoki Azuma, Toshihiko Hirao, Kiyoji Hattori, Minoru Sakurai