Patents by Inventor Kouichirou Ootsu

Kouichirou Ootsu 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 producing aluminum oxide powder
    Patent number: 7223379
    Abstract: To provide a process for producing an aluminum oxide powder, whereby the content of impurities is controlled by a physical means. A process for producing an aluminum oxide powder, which comprises pulverizing electrofused alumina by a batch system and classifying the obtained pulverized product to obtain an aluminum oxide powder different in the content of impurities. It is possible to obtain aluminum oxide of high purity by pulverization to a smaller average particle size and separating a powder having a larger average particle size by classification.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: May 29, 2007
    Assignee: Fujimi Incorporated
    Inventors: Hitoshi Kurihara, Kouichirou Ootsu
  • Process for producing aluminum oxide powder
    Publication number: 20060086840
    Abstract: To provide a process for producing an aluminum oxide powder, whereby the content of impurities is controlled by a physical means. A process for producing an aluminum oxide powder, which comprises pulverizing electrofused alumina by a batch system and classifying the obtained pulverized product to obtain an aluminum oxide powder different in the content of impurities. It is possible to obtain aluminum oxide of high purity by pulverization to a smaller average particle size and separating a powder having a larger average particle size by classification.
    Type: Application
    Filed: October 14, 2005
    Publication date: April 27, 2006
    Applicant: FUJIMI INCORPORATED
    Inventors: Hitoshi Kurihara, Kouichirou Ootsu