Patents by Inventor Keiko Ohta

Keiko Ohta 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).

  • Ag—Pd core-shell particle and use thereof
    Patent number: 11219883
    Abstract: The manufacturing method provided by the present invention provides a powder material substantially comprising Ag—Pd core-shell particles consisting of Ag core particles containing silver as a principal constituent element and a Pd shell containing palladium as a principal constituent element covering at least part of the surface of the Ag core particles, wherein hydroquinone and/or a quinone is attached to the surface of the Ag—Pd core-shell particles. Typically, when the powder material is in a dispersed state in a specific medium, a Z average particle diameter (DDLS) based on the dynamic light scattering (DLS) method is 0.1 ?m to 2 ?m, and the polydispersity index (PDI) based on the dynamic light scattering method is 0.4 or lower.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: January 11, 2022
    Inventors: Yoshiki Watanabe, Keiko Ohta, Yukiko Kikugawa
  • Ag-Pd CORE-SHELL PARTICLE AND USE THEREOF
    Publication number: 20200122124
    Abstract: The manufacturing method provided by the present invention provides a powder material substantially comprising Ag—Pd core-shell particles consisting of Ag core particles containing silver as a principal constituent element and a Pd shell containing palladium as a principal constituent element covering at least part of the surface of the Ag core particles, wherein hydroquinone and/or a quinone is attached to the surface of the Ag—Pd core-shell particles. Typically, when the powder material is in a dispersed state in a specific medium, a Z average particle diameter (DDLS) based on the dynamic light scattering (DLS) method is 0.1 ?m to 2 ?m, and the polydispersity index (PDI) based on the dynamic light scattering method is 0.4 or lower.
    Type: Application
    Filed: October 11, 2019
    Publication date: April 23, 2020
    Inventors: Yoshiki Watanabe, Keiko Ohta, Yukiko Kikugawa
  • Electric razor
    Patent number: D516245
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: February 28, 2006
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Keiko Ohta, Toshiaki Nakajo, Shinji Yamamoto
  • Depilator
    Patent number: D523174
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: June 13, 2006
    Assignee: Matsushita Electric Works, Ltd.
    Inventor: Keiko Ohta
  • Depilator
    Patent number: D523584
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: June 20, 2006
    Assignee: Matsushita Electric Works, Ltd.
    Inventor: Keiko Ohta
  • Facial steamer
    Patent number: D533650
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: December 12, 2006
    Assignee: Matsushita Electric Works, Ltd.
    Inventor: Keiko Ohta
  • Electric shaver
    Patent number: D537205
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: February 20, 2007
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Mayumi Seki, Keiko Ohta
  • Facial treatment appliance
    Patent number: D538430
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: March 13, 2007
    Assignee: Matsushita Electric Works, Ltd.
    Inventor: Keiko Ohta
  • Depilator
    Patent number: D539979
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: April 3, 2007
    Assignee: Matsushita Electric Works, Ltd.
    Inventor: Keiko Ohta
  • Handheld electric face cleaner
    Patent number: D548341
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: August 7, 2007
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Keiko Ohta, Toshiaki Nakajo
  • Electric depilator
    Patent number: D558397
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: December 25, 2007
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Mayumi Seki, Keiko Ohta
  • Electric shaver
    Patent number: D558399
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: December 25, 2007
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Mayumi Seki, Keiko Ohta
  • Skin care device
    Patent number: D568473
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: May 6, 2008
    Assignee: The Procter & Gambee Company
    Inventors: Akiko Ashiwa, Keiko Ohta
  • Electric depilator
    Patent number: D571040
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: June 10, 2008
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Mayumi Seki, Keiko Ohta
  • Electric facial pore cleaner
    Patent number: D577813
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: September 30, 2008
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Mayumi Seki, Keiko Ohta
  • Electric facial pore cleaner
    Patent number: D577814
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: September 30, 2008
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Mayumi Seki, Keiko Ohta
  • Electric depilator
    Patent number: D577862
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: September 30, 2008
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kazuma Kubono, Keiko Ohta
  • Electric shaver
    Patent number: D577863
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: September 30, 2008
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kazuma Kubono, Keiko Ohta
  • Electric depilator
    Patent number: D578252
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: October 7, 2008
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kazuma Kubono, Keiko Ohta
  • Electric depilator
    Patent number: D588743
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: March 17, 2009
    Assignee: Matsushita Electric Works Co., Ltd.
    Inventors: Kazuma Kubono, Keiko Ohta, Koji Omaki