Patents by Inventor Yuzi Sawamoto

Yuzi Sawamoto 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 preparation of secondary amine
    Patent number: 4792622
    Abstract: A secondary amine is effectively prepared by reacting an alcohol or an aldehyde with a primary amine in the presence of a catalyst of copper, nickel and a metal element belonging to the platinum group VIII at a pressure of the atmospheric pressure to 5 kg/cm.sup.2 G at a temperature of 150.degree. to 250.degree. C., while water produced in the reaction is being removed out, and separating the resulting secondary amine from the product mixture.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: December 20, 1988
    Assignee: Kao Corporation
    Inventors: Yukinaga Yokota, Yuzi Sawamoto, Hideki Taniguchi, Kazuhiko Okabe
  • Process for preparation for copper-iron-aluminum catalysts and catalysts prepared by the process
    Patent number: 4144198
    Abstract: Copper-iron-aluminum catalysts are prepared by dissolving a cupric salt, a ferrous salt and an aluminum salt in water, adding an alkali to the solution at a temperature higher than 60.degree. C. whereby to form a precipitate, separating the precipitate and water-washing, drying, calcining and pulverizing the separated precipitate.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: March 13, 1979
    Assignee: Kao Soap Co., Ltd.
    Inventors: Bunji Miya, Yuzi Sawamoto, Kunizo Hashiba, Shizuo Hisamitsu