Patents by Inventor Yuko Iwamura

Yuko Iwamura 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).

  • Publication number: 20090167830
    Abstract: A water-based ink for ink-jet recording includes a coloring agent and water. The coloring agent includes a dye represented by the following general formula (1). In the ink, an amount of glycerin is set so as to satisfy the following condition (A). 3.5X?5?Y1?3.
    Type: Application
    Filed: December 23, 2008
    Publication date: July 2, 2009
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventor: Yuko IWAMURA
  • Publication number: 20080168923
    Abstract: A black dye ink for ink-jet recording containing a black dye, a color dye for toning, a water-soluble organic solvent and water, satisfies the following inequalities (1) and (2) simultaneously: ODimax(0)?ODimin(0)?0.15, and ??(1) ODimax(1)?ODimin(1)?0.15, ??(2) where ODimax(0) and ODimin(0) are maximum and minimum optical densities, respectively, of ODiy(0), ODim(0) and ODic(0) which are the optical densities of Y, M and C color components, respectively, of a solid black printed portion printed on glossy paper with the black dye ink and having an average optical density of about 0.9 or more and about 1.1 or less; and ODimax(1) and ODimin(1) are maximum and minimum optical densities, respectively, of ODiy(1), ODim(1) and ODic(1) which are the optical densities of the Y, M and C color components, respectively, after a predetermined light fastness test is performed on the solid black printed portion.
    Type: Application
    Filed: January 9, 2008
    Publication date: July 17, 2008
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Yuko IWAMURA, Kazuma GOTO