Patents by Inventor Yuriaki Kageyama

Yuriaki Kageyama 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 the purification of malic acid
    Patent number: 3983170
    Abstract: A process for the purification of D,L-malic acid. An aqueous solution of D,-L-malic acid containing maleic acid and fumaric acid as impurities is treated with a strongly basic anion-exchange resin to remove the maleic acid and fumaric acid to provide substantially pure D,L-malic acid.
    Type: Grant
    Filed: December 6, 1974
    Date of Patent: September 28, 1976
    Assignees: International Organics, Inc., Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Shozo Sumikawa, Rikichi Maida, Yuriaki Kageyama