Patents by Inventor Ashok V. Gangal

Ashok V. Gangal 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).

  • Jet inks avoiding solid formation
    Patent number: 5352283
    Abstract: Hydroxyethylated polyethyleneimine is added to jet ink having an anionic dye to prevent whisker forming overnight. To avoid excessive viscosity at start-up, the polyethyleneimine is low molecular weight or a low molecular weight hydroxyethylated amine is combined with high molecular weight polyethyleneimine.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: October 4, 1994
    Assignee: Lexmark International, Inc.
    Inventors: Bradley L. Beach, Ashok V. Gangal, James M. Mrvos, Ann M. Piekunka, Jerry F. Stone