Patents by Inventor Takaaki Kouro

Takaaki Kouro 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: 6335085
    Abstract: An ink jet recording sheet having excellent gloss and ink absorption and capable of recording clear ink images with a high color density includes a substrate sheet impregnated or coated with a cationic compound; an ink-receiving layer formed on the cationic compound-applied substrate sheet and containing a pigment and a binder and a gloss layer formed on the ink receiving layer and containing a polymer resin produced from ethylenically unsaturated monomers.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: January 1, 2002
    Assignee: Oji Paper Co., Ltd.
    Inventors: Shinichi Asano, Takaaki Kouro, Shunichiro Mukoyoshi
  • Patent number: 5372917
    Abstract: The present invention provides a recording material utilizing a reaction between a colorless or light-colored dye precursor and a color developer capable of forming a color upon coming into contact with the dye precursor, the recording material being characterized in that the material comprises at least one compound serving as the dye precursor and represented by the formula (1), and an acidic substance serving as the color developer ##STR1## wherein R.sub.1 to R.sub.6, p and q are defined in the specification. At least one selected from the group consisting of phenolic compounds of the formulae (10), (11) and (12) and phenolic resin having a partial structure of the formula (13) can be used, as required, to further improve the color forming properties and change the color of recorded images from reddish purple or purple to blue or dark blue.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: December 13, 1994
    Assignee: Kanzaki Paper Manufacturing Co., Ltd.
    Inventors: Tetsuo Tsuchida, Tatsuya Meguro, Takaaki Kouro, Haruo Omura