Patents by Inventor Mary Louise Markowski

Mary Louise Markowski 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).

  • Cryogenic system for producing ultra-high purity nitrogen
    Patent number: 5983667
    Abstract: A process for further purification of nitrogen gas, thereby producing ultra-high purity nitrogen which is substantially free of hydrogen, oxygen and carbon monoxide, wherein the nitrogen gas is contacted with a metal-containing adsorbent at a temperature of 150 K. or less.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: November 16, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: Mary Louise Markowski, Thomas John Bergman, Jr., James Philip Natwora, Jr., John Keller Howell, David Richard Thompson