Patents by Inventor Toshihiko Hirao

Toshihiko Hirao 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-lysine by fermentation
    Patent number: 4657860
    Abstract: Production of L-lysine is carried out by a process which involves culturing a mutant microorganism having increased L-lysine productivity belonging to the genus Corynebacterium or Brevibacterium and having a resistance to at least one of purine analog and pyrimidine analog.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: April 14, 1987
    Assignee: Kwowa Hakko Kogyo Co., Ltd.
    Inventors: Toshihide Nakanishi, Toshihiko Hirao, Minoru Sakurai
  • 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