Patents by Inventor Katsuyuki Oita

Katsuyuki Oita 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).

  • Colored film
    Patent number: 5683805
    Abstract: Described is a colored film formed of a transparent film and at least one colored adhesive layer arranged on one side of the transparent film. The adhesive layer has been colored by a colorant composed of a pigment and a dispersant. The dispersant comprises a (meth)acrylate ester polymer formed, as essential monomer components, of an aromatic vinyl monomer, a primary to tertiary amino-containing (meth)acrylate ester monomer and a (meth)acrylate ester monomer containing an ammonium group quaternized with an aromatic compound.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: November 4, 1997
    Assignee: Lintec Corporation
    Inventors: Katsuyuki Oita, Kohei Tachikawa, Leonardo M. Garcia, Chandrakant C. Patel, Toshio Minagawa