Patents by Inventor Bunshi Yamada

Bunshi Yamada 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 separating dichlorocumene isomer
    Patent number: 4922039
    Abstract: A specific isomer of dichlorocumene is separated from a mixture containing dichlorocumene isomers by adsorptive separation, wherein the zeolite having at least 2 of silica/alumina molar ratio and 0.6 to 1.0 nm of pore size is used as the adsorbent and halogenated benzene or halogenated alkyl benzene is used as desorbent.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: May 1, 1990
    Assignee: Toray Industries
    Inventors: Bunshi Yamada, Michio Kimura, Yoshio Noguchi