Patents Represented by Attorney, Agent or Law Firm Stephen H. Cagle
  • Pressure sensitive copy paper employing pyrazoloxanthene compounds
    Patent number: 3988492
    Abstract: This invention discloses novel pyrazoloxanthene compounds, useful as the color-formers or imaging sources in pressure-sensitive copy papers and in thermally-sensitive imaging papers, and a process for preparing these compounds.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: October 26, 1976
    Assignee: The Mead Corporation
    Inventor: Sydney M. Spatz