Patents by Inventor Katy Ka-Yee Lee

Katy Ka-Yee Lee 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).

  • Helium recovery process
    Publication number: 20020178913
    Abstract: Improved methods for recovering helium gas from a multiple-stage consolidation furnace are disclosed. It has been discovered that a multi-valve can be actuated to respond to each of the stages of the consolidation furnace and their corresponding exhaust gases. By using this valve, the various exhaust gases can be directed to membrane separation units, PSAs, scrubbers and GRCs to remove, N2, O2, HCI, Cl2 and H2O from the gas streams and recover the helium gas.
    Type: Application
    Filed: May 3, 2002
    Publication date: December 5, 2002
    Inventors: Wenchang Ji, Arthur I. Shirley, Katy Ka-Yee Lee