Patents by Inventor Taniguchi Keishi

Taniguchi Keishi 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).

  • Pigment dispersing liquid, ink composition for ink jet and method for forming images
    Patent number: 6702889
    Abstract: A pigment dispersing liquid and an ink composition for ink jet that is made from a pigment dispersing liquid is described. The pigment dispersing liquid comprises at least a pigment, a dispersing agent and water, wherein the dispersing agent includes at least one compound selected from the compounds with formula (1a) or (1b): The ink for ink jet is formulated with the pigment dispersing liquid and at least one additive selected from the group consisting of water, a water-soluble organic solvent, a surfactant and a preservative.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: March 9, 2004
    Assignee: Ricoh Company, Ltd.
    Inventors: Hatada Shigeo, Taniguchi Keishi
  • Colorant dispersing liquid, ink composition for ink jet and method for forming picture
    Publication number: 20030024439
    Abstract: A colorant dispersing liquid and an ink composition for ink jet that is made from a colorant dispersing liquid is described.
    Type: Application
    Filed: February 26, 2002
    Publication date: February 6, 2003
    Inventors: Hatada Shigeo, Taniguchi Keishi