Patents by Inventor Isamu Koshiyama

Isamu Koshiyama 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).

  • Polishing composition and polishing method using the same
    Publication number: 20060218867
    Abstract: A polishing composition contains sodium hypochlorite, colloidal silica and water. The effective chlorine concentration in the polishing composition is 0.5 to 2.5%, and the content of colloidal silica in the polishing composition is 1 to 13% by weight. The polishing composition can be preferably used in polishing germanium or silicon-germanium single crystal.
    Type: Application
    Filed: March 27, 2006
    Publication date: October 5, 2006
    Inventors: Isamu Koshiyama, Sachiko Hoshiya, Tetsushi Senda, Haruo Masai
  • Method for polishing a single crystal or gadolinium gallium garnet
    Patent number: 4226623
    Abstract: A mechanochemical method of polishing a gadolinium gallium garnet single crystal characterized by the use of a composition made of a polishing agent selected from the group consisting of aluminum oxide, cerium oxide, zirconium oxide and chromium oxide suspended in an alkaline silicate solution selected from a group consisting of sodium silicate solution and potassium silicate solution.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: October 7, 1980
    Assignee: Fujimi Kenmazai Kogyo Co., Ltd.
    Inventors: Isamu Koshiyama, Yoshisuke Naitou
  • Compositions for polishing synthetic resin
    Patent number: 4225349
    Abstract: A composition for polishing synthetic resin comprises a calcined alumina polishing agent and water. The polishing agent is prepared by burning boehmite, crushing it into particles and separating particles having a predetermined particle distribution. Also disclosed is a synthetic resin polishing composition further containing as a polishing accelerator an aluminum compound selected from among aluminum nitrate, polyaluminum chloride, aluminum bromide, aluminum sulfate, aluminum iodide, aluminum chloride and aluminum phosphate and mixtures thereof.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: September 30, 1980
    Assignee: Fujimi Kenmazai Kogyo Co. Ltd.
    Inventors: Isamu Koshiyama, Tetsuji Senda