Patents by Inventor Dennis D. Fleming

Dennis D. Fleming 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).

  • Countercurrent reaction vessel
    Patent number: 6007787
    Abstract: A reaction vessel for processing liquid petroleum or chemical streams wherein the stream flows countercurrent to the flow of a treat gas, such as a hydrogen-containing gas, in at least one interaction zone. The reaction vessel contains vapor, and optionally liquid, passageways to bypass one or more packed beds, preferably catalyst beds. This permits more stable and efficient vessel operation.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: December 28, 1999
    Assignee: Exxon Research and Engineering Co.
    Inventors: Ramesh Gupta, David C. Dankworth, Dennis D. Fleming, Edward S. Ellis, James J. Schorfheide
  • Hydroprocessing in a countercurrent reaction vessel
    Patent number: 5985131
    Abstract: A process for upgrading a liquid petroleum or chemical stream wherein said stream flows countercurrent to the flow of a treat gas, such as a hydrogen-containing gas, in at least one reaction zone. The reaction vessel used in the practice of the present invention contains vapor and optionally liquid passageway means to bypass one or more catalyst beds. This permits more stable and efficient reaction vessel operation.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: November 16, 1999
    Assignee: Exxon Research and Engineering Company
    Inventors: Ramesh Gupta, David C. Dankworth, Dennis D. Fleming, Edward S. Ellis, James J. Schorfheide