Patents by Inventor Allen C. Sanders

Allen C. Sanders 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).

  • Dye having hydrophobic substituent and aqueous ink
    Patent number: 5494507
    Abstract: A dye having a representative formula as follows and an ink providing waterfast printing having the dye, in which a surfactant is not essential: ##STR1##
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: February 27, 1996
    Assignee: Lexmark International, Inc.
    Inventors: Bradley L. Beach, James F. Feeman, Ann M. Piekunka, Allen C. Sanders
  • Waterfast dye and aqueous ink
    Patent number: 5198022
    Abstract: A alkali-soluble dye for a waterfast ink having structural formula as follows: ##STR1## and an ink containing the dye dissolved in water. Printing from the ink is insoluble below pH 6.0; is an intense black at low concentration; and remains black on acid papers. The aqueous inks are stable and exhibit good printhead nozzle maintenance.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: March 30, 1993
    Assignee: Lexmark International, Inc.
    Inventors: Rodney O. Aulick, Bradley L. Beach, Donald L. Elbert, Terence E. Franey, James F. Feeman, John M. Olson, Allen C. Sanders, Robert L. Vollmer