Patents by Inventor Akira Shimogawara

Akira Shimogawara 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).

  • Cerium-based abrasive material and method for preparation thereof
    Patent number: 6843816
    Abstract: A cerium-based abrasive and a production method of the cerium-based abrasive excellent in polishing properties of a high polishing speed and scarce formation of polishing scratches are provided by keeping the color of the abrasive in specified ranges or stably making fluorine be contained in the abrasive. For example, as such a cerium-based abrasive, examples include a cerium-based abrasive containing cerium oxide as a main component and having an L* value in a range not lower than 65 and or lower 90, an a* value in a range 0 or higher but 15 or lower, and a b* value in a range 10 or higher but 30 or lower in the case the color is expressed by an L*a*b* color system.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: January 18, 2005
    Assignee: Mitsui Mining & Smelting Co., Ltd.
    Inventors: Terunori Ito, Naoyoshi Mochizuki, Hiroyuki Watanabe, Yoshitsugu Uchino, Akira Shimogawara
  • Cerium-based abrasive material and method for preparation thereof
    Publication number: 20040093803
    Abstract: A cerium-based abrasive and a production method of the cerium-based abrasive excellent in polishing properties of a high polishing speed and scarce formation of polishing scratches are provided by keeping the color of the abrasive in specified ranges or stably making fluorine be contained in the abrasive. For example, as such a cerium-based abrasive, examples include a cerium-based abrasive containing cerium oxide as a main component and having an L* value in a range not lower than 65 and or lower 90, an a* value in a range 0 or higher but 15 or lower, and a b* value in a range 10 or higher but 30 or lower in the case the color is expressed by an L*a*b* color system.
    Type: Application
    Filed: August 7, 2003
    Publication date: May 20, 2004
    Inventors: Terunori Ito, Naoyoshi Mochizuki, Hiroyuki Watanabe, Yoshitsugu Uchino, Akira Shimogawara