Patents by Inventor Kotaro Ishiwata

Kotaro Ishiwata 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).

  • Chromium Alloy Coating with Enhanced Resistance to Corrosion in Calcium Chloride Environments
    Publication number: 20170342582
    Abstract: The invention consists of a chromium electroplating solution comprising a chromium electroplating solution comprising: (1) a water soluble trivalent chromium salt; (2) at least one complexant for trivalent chromium ions; (3) a source of hydrogen ions sufficient to create a pH of from 2.8-4.2; (4) a pH buffering compound; and (5) a sulfur-containing organic compound. The chromium electroplating solution is usable in a method for producing an adherent metallic coating on a decorative article, such coating having enhanced resistance to corrosion in environments containing calcium chloride.
    Type: Application
    Filed: August 16, 2017
    Publication date: November 30, 2017
    Inventors: Roderick D. Herdman, Stacey Handy, Trevor Pearson, Toshiyuki Yamamoto, Kotaro Ishiwata, Masahiro Hara, Tatsuya Nishiyama
  • Chromium alloy coating with enhanced resistance to corrosion in calcium chloride environments
    Patent number: 9765437
    Abstract: The invention consists of a chromium electroplating solution comprising a chromium electroplating solution comprising: (1) a water soluble trivalent chromium salt; (2) at least one complexant for trivalent chromium ions; (3) a source of hydrogen ions sufficient to create a pH of from 2.8-4.2; (4) a pH buffering compound; and (5) a sulfur-containing organic compound. The chromium electroplating solution is usable in a method for producing an adherent metallic coating on a decorative article, such coating having enhanced resistance to corrosion in environments containing calcium chloride.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: September 19, 2017
    Inventors: Roderick D. Herdman, Stacey Handy, Trevor Pearson, Toshiyuki Yamamoto, Kotaro Ishiwata, Masahiro Hara, Tatsuya Nishiyama
  • Chromium Alloy Coating with Enhanced Resistance to Corrosion in Calcium Chloride Environments
    Publication number: 20100243463
    Abstract: The invention consists of a chromium electroplating solution comprising a chromium electroplating solution comprising: (1) a water soluble trivalent chromium salt; (2) at least one complexant for trivalent chromium ions; (3) a source of hydrogen ions sufficient to create a pH of from 2.8-4.2; (4) a pH buffering compound; and (5) a sulfur-containing organic compound. The chromium electroplating solution is usable in a method for producing an adherent metallic coating on a decorative article, such coating having enhanced resistance to corrosion in environments containing calcium chloride.
    Type: Application
    Filed: March 24, 2009
    Publication date: September 30, 2010
    Inventors: Roderick D. Herdman, Stacey Handy, Trevor Pearson, Toshiyuki Yamamoto, Kotaro Ishiwata, Masahiro Hara, Tatsuya Nishiyama