Patents by Inventor R. Judy Hwan

R. Judy Hwan 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).

  • Black water filter for high ash containing feedstock
    Publication number: 20030015483
    Abstract: The present invention involves the addition of a black water filter to the outlet of the quench chamber of the gasification reactor. The normal flow of water out of the gasification reactor is through the side of the quench chamber, but in the present invention it leaves out the bottom of the quench chamber into the black water filter. In the black water filter, slag in the black water is allowed to settle out. Soot water exits the top of the black water filter and flows to downstream purification/processing units.
    Type: Application
    Filed: July 19, 2001
    Publication date: January 23, 2003
    Applicant: Texaco Inc.
    Inventors: R. Judy Hwan, Frederick B. Seufert