Patents by Inventor Arthur N. Stefani

Arthur N. Stefani 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).

  • Method of performing a decoking cycle
    Publication number: 20080109107
    Abstract: An integrated computer control process is used for a decoking cycle that takes into account all affected process variables including temperature, pressure, flow rates, and time related functions. Manual operator input is limited to setting the basis of the decoking cycle, which can include temperatures and pressure ranges, and monitoring key parameters, such as pressure tests.
    Type: Application
    Filed: November 3, 2006
    Publication date: May 8, 2008
    Inventors: Arthur N. Stefani, Joshua Stephen Hogue, Eberhard Lucke, Rick O. Castillo
  • Waste sludge disposal process
    Patent number: 5389234
    Abstract: Waste refinery sludge having a high water content along with hydrocarbon liquids and solids is disposed of in a delayed coking process. The sludge is pretreated and heated to a coking temperature and then introduced into the top of a delayed coking drum.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: February 14, 1995
    Assignee: ABB Lummus Crest Inc.
    Inventors: Alok K. Bhargava, Wai Seung W. Louie, Arthur N. Stefani