Patents by Inventor Kazumi Maki

Kazumi Maki 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).

  • Heat sensitive recording material
    Patent number: 5466656
    Abstract: The present invention provides a heat sensitive recording material comprising a recording layer formed on a substrate and containing a colorless or light-colored basic dye and a color acceptor, the material being characterized in that the basic dye is 3-(N-ethyl-N-p-tolyl)amino-6-methyl-7-p-toluidinofluoran, the color acceptor is bis(3-allyl-4-hydroxyphenyl)sulfone and/or 4-hydroxy-4'-isopropoxydiphenylsulfone.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: November 14, 1995
    Assignee: New Oji Paper Company, Ltd.
    Inventors: Tomoyuki Okimoto, Kazumi Maki, Katsuhiko Ishida