Patents by Inventor Yoshirou Uchiyama

Yoshirou Uchiyama 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 paper
    Patent number: 4894359
    Abstract: The present invention provides a novel bis(phenoxymethyl)benzene derivative or bis(naphthoxymethyl)benzene derivative, which improves the stability of image on a heat sensitive recording paper composed of a leuco dye and a developer.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: January 16, 1990
    Assignee: Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
    Inventors: Ryuzo Ueno, Shinichi Katsura, Yoshirou Uchiyama, Satomi Inoue
  • New compounds and their application
    Patent number: 4855482
    Abstract: The present invention provides a novel bis(phenoxymethyl)benzene derivative or bis(naphthoxymethyl)benzene derivative, which improves the stability of image on a heat sensitive recording paper composed of a leuco dye and a developer.
    Type: Grant
    Filed: June 26, 1987
    Date of Patent: August 8, 1989
    Assignee: Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
    Inventors: Ryuzo Ueno, Shinichi Katsura, Yoshirou Uchiyama, Satomi Inoue