Patents by Inventor Chris W. Burkhart

Chris W. Burkhart 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).

  • Pressure-induced shut-off valve for a liquid delivery system
    Patent number: 6039074
    Abstract: A pressure-induced shut-off valve for a liquid delivery system with a back pressure regulator having a positive shut-off capability is provided. The pressure-induced shut-off valve may incorporate an integrated purge valve or an integrated cross flow nebulizer/vaporizer. The pressure-induced shut-off valve functions as a variable flow restrictor which automatically adjusts itself to provide a constant back pressure in the liquid line.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: March 21, 2000
    Assignee: Novellus Systems, Inc.
    Inventors: Ivo J. Raaijmakers, Chris W. Burkhart, David Christensen, Michael N. Susoeff