Patents by Inventor Takafusa Ando

Takafusa Ando 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 marking pen
    Patent number: 4664711
    Abstract: A marking ink for use in marking pens is described, comprising 5 to 40% by weight of titanium dioxide surface treated with an alkaline earth metal or aluminum salt of a fatty acid having from 6 to 22 carbon atoms, 3 to 20% by weight of a resin, and a remainder of an organic solvent capable of dissolving therein the resin. The marking ink may further contain 0.5 to 30% by weight of a colorant. In this marking ink, precipitation and separation of titanium dioxide is controlled, and even if such precipitation and separation occur, titanium dioxide can be easily re-dispersed in the ink.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: May 12, 1987
    Assignee: Pilot Ink Co., Ltd.
    Inventors: Keizo Kawaguchi, Takafusa Ando