Patents by Inventor Tsutomu Mizuta

Tsutomu Mizuta 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).

  • Recovery of acetic anhydride
    Patent number: 4737318
    Abstract: Acetic anhydride is recovered from a mixture of acetic anhydride, acetic acid and water by contacting the mixture with at least one extraction solvent selected from the group consisting of a hydrophobic, organic solvent, a ketone and an ester to extract and recover acetic anhydride.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: April 12, 1988
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masaaki Ichino, Kunio Koga, Tsutomu Mizuta, Takashi Matsuyama