Patents by Inventor Yukoh Saitoh

Yukoh Saitoh 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).

  • Patent number: 8398761
    Abstract: The present invention provides an ink composition for use in inkjet recording, the ink composition including one of water-soluble dye and water in an amount of from 20% to 40% by mass, which is capable of recording an image that is suppressed in the variation of image density immediately after printing.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: March 19, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Yukoh Saitoh
  • Publication number: 20100247768
    Abstract: The present invention provides an ink composition for use in inkjet recording, the ink composition including one of water-soluble dye and water in an amount of from 20% to 40% by mass, which is capable of recording an image that is suppressed in the variation of image density immediately after printing.
    Type: Application
    Filed: March 5, 2010
    Publication date: September 30, 2010
    Applicant: FUJIFILM CORPORATION
    Inventor: Yukoh SAITOH
  • Patent number: 5726000
    Abstract: A dispersion of fine solid particles having good production suitability, good dispersion stability and high spectral absorption, which is obtained by pulverizing an aqueous slurry of a dye represented by general formula (II) in the presence of a polyalkylene oxide represented by general formula (I-a) or (I-b): ##STR1## wherein a and b each represents a value of 5 to 500.D--(X).sub.y (II)wherein D represents a compound residue having a chromophore, X represents dissociative hydrogen or a group having dissociative hydrogen, and y is an integer of 1 to 7. An embodiment that a compound represented by general formula (I) is present together with the polyalkylene oxide of general formula (I-a) or (I-b) is also disclosed.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: March 10, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masatoshi Nakanishi, Yukoh Saitoh, Masahiro Fukuoka