Patents by Inventor Hirofumi Sakiyama

Hirofumi Sakiyama 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).

  • Ink-jet recording water-based ink composition
    Publication number: 20090246479
    Abstract: An ink-jet recording water-based ink composition includes a polymer obtained by emulsion polymerization of a monomer having an ethylene-type unsaturated bond in the molecule and divinylbenzene in the presence of a reactive emulsifier, a polyethylene-based wax, a water-soluble resin, water, and a colorant. When ink coat is formed on a plastic film having a degree of gloss at 60° of 140 to 150 by discharging droplets of the ink composition onto the plastic film, the ink coat has a degree of gloss at 60° within a range of 50 to 120.
    Type: Application
    Filed: March 30, 2009
    Publication date: October 1, 2009
    Applicant: Seiko Epson Corporation
    Inventors: Hiroshi Mukai, Katsuko Aoki, Takashi Mori, Hirofumi Sakiyama, Tomoaki Seko, Keiichi Bessho