Patents by Inventor Takao Yotsuyanagi

Takao Yotsuyanagi 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 recovering gallium
    Patent number: 4631177
    Abstract: A method for recovering gallium from an aqueous solution containing gallium, which comprises contacting the aqueous solution containing gallium to a porous polymer having a water-insoluble substituted quinolinol retained therein, to let the polymer adsorb gallium, and then eluting gallium from the polymer.
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: December 23, 1986
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Takao Yotsuyanagi, Yoshinobu Nishiyama