Patents by Inventor Mitsuyo Sugi

Mitsuyo Sugi 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 producing potassium oxonate
    Patent number: 6090940
    Abstract: A method for producing potassium oxonate which comprises dissolving allantoin in an aqueous potassium hydroxide solution or an aqueous potassium carbonate solution, and oxidizing said allantoin with an alkali metal hypohalogenite in the presence of potassium iodide is provided and, according to the method, potassium oxonate can be efficiently produced without requiring a manganese compound which may entail environmental pollution.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: July 18, 2000
    Assignees: Sumika Fine Chemicals Co., Ltd., Taiho Pharmaceutical Co., Ltd.
    Inventors: Mitsuyo Sugi, Masami Igi