Patents by Inventor Yaeko Maruyama

Yaeko Maruyama 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 for ink-jet printing
    Patent number: 5190582
    Abstract: An ink composition for ink-jet printing, capable of producing a high-quality image without causing blur, comprising, as essential components, a coloring component and a dispersion medium in which the coloring component is homogeneously dispersed and retained, characterized in that the coloring component is insoluble in the dispersion medium and is dispersed therein in the state of finely divided particles of a size of 0.01 .mu.m or more, that the dispersion medium comprises a liquid having a surface tension at 25.degree. C. of 50 dyn/cm or less, and that the ink composition has the property that the dispersion medium immediately separates from the coloring component at the instant when the ink composition is deposited on an image-recording material.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: March 2, 1993
    Assignee: Seiko Epson Corporation
    Inventors: Masakazu Shinozuka, Hiroto Nakamura, Kenichi Kanbayashi, Yaeko Maruyama, Noriko Oyama, Hiroyuki Onishi