Patents by Inventor Katushi Kihara

Katushi Kihara 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).

  • Methods for making urethane molded products for polishing pads
    Patent number: 6627671
    Abstract: Urethane molded products for polishing pad comprise two types of cells having different sizes in urethane molded products formed by mixing and curing an isocyanate-terminated urethane prepolymer and an active hydrogen-containing compound. The molded products may be made by a procedure comprising mixing expanded microballoons or non-expanded, thermally expandable microspheres and water with the isocyanate-terminated urethane prepolymer and active hydrogen-containing compound and curing the mixture.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: September 30, 2003
    Assignee: Fuji Spinning Co., Ltd.
    Inventors: Katushi Kihara, Yoshimi Mochizuki
  • Urethane molded products for polishing pad and method for making same
    Patent number: 6239188
    Abstract: Urethane molded products for polishing pad comprise two types of cells having different sizes in a urethane molded products formed by mixing and curing an isocyanate-terminated urethane prepolymer and an active hydrogen-containing compound. The molded products may be made by procedure comprising mixing expanded microballoons having a size of 10 to 50 &mgr;m and expanded microballoons having a size of 80 to 100 &mgr;m with the prepolymer and active hydrogen-containing compound and curing the mixture.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: May 29, 2001
    Assignee: Fuji Spinning Co., Ltd.
    Inventors: Katushi Kihara, Yoshimi Mochizuki