Patents by Inventor Ihuaku Ihejirika

Ihuaku Ihejirika 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).

  • KRYPTON XENON RECOVERY FROM PIPELINE OXYGEN
    Publication number: 20130239609
    Abstract: A method and apparatus for producing a krypton-xenon-rich stream in which a pipeline oxygen stream is removed from an oxygen pipeline at ambient temperature and then distilled in a cryogenic rectification plant to produce the krypton-xenon-rich stream from a column bottoms of a distillation column. The plant can generate its own refrigeration by way of a heat pump loop incorporating an expander or, alternatively, refrigeration can be added by means of a liquid oxygen reflux stream introduced into the top of such distillation column.
    Type: Application
    Filed: May 7, 2013
    Publication date: September 19, 2013
    Inventors: David Ross Parsnick, Neil Mark Prosser, Ihuaku Ihejirika
  • Krypton xenon recovery from pipeline oxygen
    Patent number: 8484992
    Abstract: A method and apparatus for producing a krypton-xenon-rich stream in which a pipeline oxygen stream is removed from an oxygen pipeline at ambient temperature and then distilled in a cryogenic rectification plant to produce the krypton-xenon-rich stream from a column bottoms of a distillation column. The plant can generate its own refrigeration by way of a heat pump loop incorporating an expander or, alternatively, refrigeration can be added by means of a liquid oxygen reflux stream introduced into the top of such distillation column.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: July 16, 2013
    Assignee: Praxair Technology, Inc.
    Inventors: David Ross Parsnick, Neil Mark Prosser, Ihuaku Ihejirika