Patents by Inventor Hidemitsu Shimizu

Hidemitsu Shimizu 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 purifying aluminum
    Patent number: 6398845
    Abstract: A method for purifying aluminum to provided which comprises the steps of maintaining aluminum as a starting material in a molten condition in N+1 vessels; wherein N+1 vessels for molten aluminum and N cooling bodies are provided which are immersed in molten aluminum in the vessels and upon which highly purified aluminum is crystallized on the surfaces thereof. The N+1 vessels are arranged sequentially from 1-st to (N+1)-th and the N cooling bodies are sequentially arranged from 1-st to N-th, respectively, and the vessels and cooling bodies are moved relative to each other.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: June 4, 2002
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroshi Tabuchi, Ichiro Tanaka, Akihiko Takahashi, Hidemitsu Shimizu