Patents by Inventor Rieka Sekiguchi

Rieka Sekiguchi 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).

  • Actinic radiation curable ink-jet ink and image forming method using the same
    Patent number: 7749573
    Abstract: An actinic radiation curable ink-jet ink comprising: a metal complex pigment; a cationically polymerizable compound; a polymer dispersing agent having a basic functional group exhibiting an amine value of 5-40 mg/g; and a photo acid generating agent, wherein the cationically polymerizable compound comprises an oxirane ring. The aforesaid actinic radiation curable ink-jet ink enable to achieve an ink-jet ink exhibiting excellent storage stability, ejection capability, and curability after ejection, and enables formation of highly detailed images which realize high density, uniform glossiness, and excellent color reproduction, and forms no wrinkling, and provide a image forming method using the same.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: July 6, 2010
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventors: Tsutomu Iwamoto, Toshiyuki Takabayashi, Daisuke Ishibashi, Rieka Sekiguchi
  • Activated light curable inkjet ink and image formation method
    Patent number: 7494212
    Abstract: An activated light curable inkjet ink including: a photo-initiator, photo-polymerizable compound dispersant and modified silicone oil, wherein, when 0.1 percent by mass of the modified silicone oil is added to said activated light curable inkjet ink containing no modified silicone oil, a surface tension at 25° C. is reduced by 0 through 3 mN/m.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: February 24, 2009
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventors: Toshiyuki Takabayashi, Rieka Sekiguchi
  • Actinic Radiation Curable Ink-Jet Ink and Image Forming Method Using the Same
    Publication number: 20080152832
    Abstract: An actinic radiation curable ink-jet ink comprising: a metal complex pigment; a cationically polymerizable compound; a polymer dispersing agent having a basic functional group exhibiting an amine value of 5-40 mg/g; and a photo acid generating agent, wherein the cationically polymerizable compound comprises an oxirane ring. The aforesaid actinic radiation curable ink-jet ink enable to achieve an ink-jet ink exhibiting excellent storage stability, ejection capability, and curability after ejection, and enables formation of highly detailed images which realize high density, uniform glossiness, and excellent color reproduction, and forms no wrinkling, and provide a image forming method using the same.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 26, 2008
    Inventors: Tsutomu Iwamoto, Toshiyuki Takabayashi, Daisuke Ishibashi, Rieka Sekiguchi
  • Activated light curable inkjet ink and image formation method
    Publication number: 20060050121
    Abstract: An activated light curable inkjet ink comprising: a photo-initiator, photo-polymerizable compound dispersant and modified silicone oil, wherein, when 0.1 percent by mass of the modified silicone oil is added to said activated light curable inkjet ink containing no modified silicone oil, a surface tension at 25° C. is reduced by 0 through 3 mN/m.
    Type: Application
    Filed: September 6, 2005
    Publication date: March 9, 2006
    Inventors: Toshiyuki Takabayashi, Rieka Sekiguchi