Patents by Inventor Robin Gant Gnerlich

Robin Gant Gnerlich 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).

  • Process for preparing pigment dispersions used in inks
    Patent number: 5891231
    Abstract: A method for making a dispersion for an ink, and the ink obtained from this method. The method comprises preparing a dispersion comprising colorant agglomerates and reducing the agglomerate size using a plastic medium. The dispersion is formed by dispersing the colorant agglomerates in a dispersant, optionally in the presence of a liquid carrier such as distilled or deionized water. The colorant in the dispersion may be a carbon black, yellow, cyan, or magenta pigment, or a combination thereof. The plastic medium is preferably a grinding medium, such as polystyrene.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: April 6, 1999
    Assignee: Lexmark International Inc.
    Inventors: Robin Gant Gnerlich, Anna Marie Pearson, Ashok Vishnu Gangal