Patents by Inventor Katsumi Toide

Katsumi Toide 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).

  • Method for purification of an amino acid using ion exchange resin
    Patent number: 5279744
    Abstract: A method for purification of an amino acid which comprises contacting an amino acid solution containing impurities with an ion exchange resin to selectively adsorb the amino acid onto the resin, eluting and recovering the adsorbed amino acid whereby the resin is contacted with the amino acid solution in countercurrent continuous multiple steps during adsorption and an eluent is contacted with the adsorbed resin in countercurrent continuous multiple steps during elution.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: January 18, 1994
    Assignee: Ajinomoto Co., Inc.
    Inventors: Hisao Itoh, Katsumi Toide, Masao Ikeda