Patents by Inventor Tuyoshi Nakamatu

Tuyoshi Nakamatu 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 riboflavin by fermentation
    Patent number: 5334510
    Abstract: The present invention provides a process for producing riboflavin by fermentation, a method for providing microorganisms having an improved riboflavin-producing capability, and strains of microorganisms having improved riboflavin-producing ability. The strains of the present invention belong to the genus Bacillus, have reduced activity of hydrolysing phosphoric acid from 5'-guanylic acid, and have the ability of producing riboflavin. Mutants used in the processes of this invention have an improved ability of producing riboflavin and are capable of producing or accumulating a large amount of riboflavin in the culture medium. The processes of this invention are therefore suitable for producing riboflavin in an effective manner at a low cost.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: August 2, 1994
    Assignee: Ajinomoto Co., Inc.
    Inventors: Naoki Usui, Yoko Yamamoto, Tuyoshi Nakamatu