Patents by Inventor Masahi Hiroki

Masahi Hiroki 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).

  • Inkjet ink composition and printed matters created using inkjet ink composition
    Patent number: 7579390
    Abstract: There is proposed an inkjet ink composition comprising a pigment component to which a resin having a basic terminal is adsorbed, a photo-acid generating agent containing an onium salt, and at least one kind of solvent which can be polymerized under the presence of an acid. The content of multivalent salt included in the onium salt is not more than 20% by weight based on a total weight of onium salt, and the content of the pigment component is confined within the range of 3 to 41% by weight based on the ink composition.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: August 25, 2009
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Toru Ushirogouchi, Kazuhiko Ohtsu, Mitsuru Ishibashi, Ryozo Akiyama, Masahi Hiroki