Patents by Inventor Toshio Kitahara

Toshio Kitahara 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).

  • L-phenylalanine 1/2 sulfate and its use
    Patent number: 4399304
    Abstract: The present invention relates to L-phenylalanine 1/2 sulfate and its use in the purification of L-phenylalanine from fermentation broths. When the salt is crystallized from a fermentation broth of L-phenylalanine or a solution produced during an intermediate process of recovering L-phenylalanine from the fermentation broth, impurities derived from the fermentation broth are easily removed.
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: August 16, 1983
    Assignee: Ajinomoto Company Incorporated
    Inventors: Tsutomu Matsuishi, Hiromasa Maruyama, Toshio Kitahara, Akemi Kabashima, Ryuta Toyomasu