Patents by Inventor Toyoo Kaijima

Toyoo Kaijima 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 of unloading catalyst
    Patent number: 4912071
    Abstract: The present invention relates to a method of unloading a catalyst from a reactor wherein the reactor is filled with mixed liquid of condensed ring aromatic hydrocarbon having a required number of ring members, i.e. preferably 2 to 4 ring members, and gas oil, to wet the catalyst so as to form a coating of film on the catalyst before unloading the catalyst from the reactor.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: March 27, 1990
    Assignees: Kashima Engineering Co., Ltd., Softard Industries Co., Ltd.
    Inventors: Toyoo Kaijima, Tomiyasu Hirachi, Katsuhiko Kawakami, Junichi Takano