Patents by Inventor Kazuoki Urabe

Kazuoki Urabe 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 extraction
    Patent number: 5034132
    Abstract: There is disclosed a method for extraction of impurities from a powdery or particulate solid material charged into a extractor. According to the disclosure, not only can the extraction of impurities be carried out efficiently, but also the refinement of a solid material can be carried out, with the degree of the extraction of the impurities being very high.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: July 23, 1991
    Assignees: Toyo Engineering Corporation, Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Hisashi Miyakawa, Naoki Mizutani, Kazuoki Urabe, Kageo Yoshida, deceased, Osamu Nittani, Koji Hirano