Patents by Inventor Yoshifumi Bandou

Yoshifumi Bandou 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).

  • Apparatus for producing polishing solution and apparatus for feeding the same
    Patent number: 6709313
    Abstract: Apparatus for producing a polishing solution composed of pure water and abrasive grains, the apparatus including a preparation tank to prepare a polishing solution containing abrasive grains at a predetermined concentration, by mixing an abrasive grain-containing slurry and pure water, and a circulation device for circulating the thus prepared polishing solution to keep the solution in a suspended state. The circulation device includes a circulation conduit and a flow-controllable bypass conduit fluidly associated with the circulation conduit providing a constant flow rate and having a light-extinction type particle detector for monitoring the polishing solution so as to detect large abrasive grains having a particle size not less than a predetermined value and measure the number of the large abrasive grains.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: March 23, 2004
    Assignee: Rion Co., Ltd.
    Inventors: Kaoru Kondo, Naoki Tsuda, Norihiro Takasaki, Yoshifumi Bandou, Masumi Hino, Kenyou Miyata
  • Apparatus for producing polishing solution and apparatus for feeding the same
    Publication number: 20020061722
    Abstract: The present invention relates to an apparatus for producing a polishing solution mainly comprising pure water and abrasive grains, which apparatus comprises:
    Type: Application
    Filed: November 13, 2001
    Publication date: May 23, 2002
    Inventors: Kaoru Kondo, Naoki Tsuda, Norihiro Takasaki, Yoshifumi Bandou, Masumi Hino, Kenyou Miyata