Patents by Inventor Kenji Kiwa

Kenji Kiwa 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).

  • Nonstick finish for molding articles
    Patent number: 5874489
    Abstract: A nonstick coating compositions for mold surfaces is disclosed which coatings have superior release properties and impart a matte finish to the molded article and maintain these performance characteristics over protracted periods of use. The disclosed coating composition comprises a filled fluoropolymer and polymer binder, where the filled fluoropolymer comprises an inorganic filler particle which is wholly or partially encapsulated by a fluoropolymer powder which composition when applied to a mold surface produces a surface profile with an average roughness Ra of 1 to 15 microns after spraying and curing.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: February 23, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Luc Germain Pierre Joseph D'Haenens, Kenji Kiwa
  • Process for adhering a fluororesin film to a metal surface using a primer
    Patent number: 5670010
    Abstract: A process for adhering a fluororesin film to a metal surface, using a primer comprising fluororesin, aluminum flake and more polyether sulfone than polyamideimides.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: September 23, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Minori Hagiwara, Kenji Kiwa, Tatsuya Ogita, Luc Germain Pierre Joseph D'Haenens
  • Process for coating metal surfaces with a fluororesin using a primer
    Patent number: 5626907
    Abstract: A process for coating a metal surface with a fluororesin, using a primer comprising fluororesin, aluminum flake and more polyether sulfone than polyamideimides.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: May 6, 1997
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Minori Hagiwara, Kenji Kiwa, Tatsuya Ogita, Luc G. P. J. D'Haenens
  • Fluorocarbon paint composition
    Patent number: 5376307
    Abstract: A coating composition of a perfluorocarbon resin and an electroconductive double shell pigment comprising inner shells of amorphous silica or a silica-containing material and outer shells of antimony-containing tin oxide is useful on a copy roller or belt.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: December 27, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Minori Hagiwara, Kenji Kiwa, Laurence W. McKeen