Patents by Inventor Shinzo Uda

Shinzo Uda 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 tungsten compounds
    Patent number: 4629606
    Abstract: The present invention provides a process for recovering a tungsten compound from a waste liquor containing a high-boiling organic compound and the tungsten compound, which process comprises the steps of spray-burning said waste liquor at an air ratio of 1.05 or higher under conditions of a temperature and a residence time which lie within the region of a pentagon defined by points A, B, C, D, and E in FIG. 1; quenching the combustion product by immediately bringing it into direct contact with water; and recovering the tungsten compound.
    Type: Grant
    Filed: July 16, 1985
    Date of Patent: December 16, 1986
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yoshiyuki Imagire, Teruhiko Hirabayashi, Nobuo Nonaka, Toshifumi Kitagawa, Yasukazu Murakami, Iwao Abe, Shinzo Uda, Osamu Ohshima, Etsuo Takemoto