Patents by Inventor Tyagaraja Sarada

Tyagaraja Sarada 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).

  • High resolution pigment ink for impulse ink jet printing
    Patent number: 6391943
    Abstract: Impulse ink jet compositions are provided which are suitable for printing clear, well-defined alphanumeric text or low spread, narrow bar width bar codes on porous substrates such as Kraft paper or corrugated cardboard. In one embodiment, the ink compositions preferably comprise from about 20 to 50 percent by weight of a carbon black dispersion, from about 10 to 20 percent by weight of a dispersion medium, from about 40 to 60 percent by weight of a plasticizer and optionally an antioxidant additive. The antioxidant additive lowers the dissolved oxygen level in the ink, thereby enhancing the jetting performance of the printhead.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: May 21, 2002
    Assignee: Trident International, Inc.
    Inventors: Deverakonda S. Sarma, Brian Salisbury, Tyagaraja Sarada