Patents by Inventor Tetsuzo Tomioka

Tetsuzo Tomioka 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 making .beta.-mercaptopropionic acid
    Patent number: 5256818
    Abstract: A novel method for making .beta.-mercaptopropionic acid which comprises adding alkaline hydroxide to thiodipropionic acid to obtain alkaline thiodipropionate, mixing thus obtained alkaline thiodipropionate with an aqueous solution of alkaline sulfide, then reacting the mixed solution with addition of heating in a required time, and acidifying the reacted solution with a strong acid.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: October 26, 1993
    Inventor: Tetsuzo Tomioka