Patents by Inventor B. M. Karandikar

B. M. Karandikar 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).

  • Hyperthermogelling aqueous phase change inks and methods for using them in an ink jet printer
    Patent number: 5462591
    Abstract: An aqueous phase change ink contains a selected concentration of hyperthermogelling component that causes the ink to gel when its temperature is increased to its thermo-inversion point or when the concentration of the hyperthermogelling component is increased by evaporation, or substrate absorption, of water from the ink. The ink may be jetted directly onto a heated and/or absorptive substrate or jetted onto a cooler and/or hydrophobic surface before being transferred to the substrate. The thermo-inversion point is preferably about ambient temperature, and the preferred hyperthermogelling component is a nonionic surfactant, such as an ethylene oxide propylene oxide block copolymer surfactant.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: October 31, 1995
    Assignee: Tektronix, Inc.
    Inventors: B. M. Karandikar, Loc V. Bui, Hue P. Le