Patents by Inventor Douglas George Stewart

Douglas George Stewart 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).

  • Separation system and method
    Patent number: 8211312
    Abstract: One exemplary embodiment can be a separation system. The separation system can include an adsorption zone, a rotary valve, a transition zone, and one or more pipes. Usually, the transition zone includes one or more lines communicating the rotary valve with the adsorption zone. The rotary valve alternatively may distribute an input of a feed or a desorbent to the adsorption zone or alternatively can receive an output of a raffinate or an extract from the adsorption zone in a line, and a remnant may remain in the line from a previous input or output. One or more pipes outside the transition zone communicating with the rotary valve can form at least one pipe volume receiving an input for dislodging a remnant or for receiving a remnant from the line. The remnant may be different from the input or output.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: July 3, 2012
    Assignee: UOP LLC
    Inventors: Douglas George Stewart, Grace Chao, Braden E. Smith, Stephen W. Sohn, Robert J. L. Noe
  • SEPARATION SYSTEM AND METHOD
    Publication number: 20120090731
    Abstract: One exemplary embodiment can be a separation system. The separation system can include an adsorption zone, a rotary valve, a transition zone, and one or more pipes. Usually, the transition zone includes one or more lines communicating the rotary valve with the adsorption zone. The rotary valve alternatively may distribute an input of a feed or a desorbent to the adsorption zone or alternatively can receive an output of a raffinate or an extract from the adsorption zone in a line, and a remnant may remain in the line from a previous input or output. One or more pipes outside the transition zone communicating with the rotary valve can form at least one pipe volume receiving an input for dislodging a remnant or for receiving a remnant from the line. The remnant may be different from the input or output.
    Type: Application
    Filed: December 20, 2011
    Publication date: April 19, 2012
    Applicant: UOP LLC
    Inventors: Douglas George Stewart, Grace Chao, Braden E. Smith, Stephen W. Sohn, Robert J.L. Noe
  • SEPARATION SYSTEM AND METHOD
    Publication number: 20100249484
    Abstract: One exemplary embodiment can be a separation system. The separation system can include an adsorption zone, a rotary valve, a transition zone, and one or more pipes. Usually, the transition zone includes one or more lines communicating the rotary valve with the adsorption zone. The rotary valve alternatively may distribute an input of a feed or a desorbent to the adsorption zone or alternatively can receive an output of a raffinate or an extract from the adsorption zone in a line, and a remnant may remain in the line from a previous input or output. One or more pipes outside the transition zone communicating with the rotary valve can form at least one pipe volume receiving an input for dislodging a remnant or for receiving a remnant from the line. The remnant may be different from the input or output.
    Type: Application
    Filed: March 27, 2009
    Publication date: September 30, 2010
    Inventors: Douglas George Stewart, Grace Chao, Braden E. Smith, Stephen W. Sohn, Robert J.L. Noe