Patents by Inventor Donald C. Stewart

Donald C. 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).

  • Microchannel laminated mass exchanger and method of making
    Patent number: 6533840
    Abstract: The present invention is a microchannel mass exchanger having a first plurality of inner thin sheets and a second plurality of outer thin sheets. The inner thin sheets each have a solid margin around a circumference, the solid margin defining a slot through the inner thin sheet thickness. The outer thin sheets each have at least two header holes on opposite ends and when sandwiching an inner thin sheet. The outer thin sheets further have a mass exchange medium. The assembly forms a closed flow channel assembly wherein fluid enters through one of the header holes into the slot and exits through another of the header holes after contacting the mass exchange medium.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: March 18, 2003
    Assignee: Battelle Memorial Institute
    Inventors: Peter M. Martin, Wendy D. Bennett, Dean W. Matson, Donald C. Stewart, Monte K. Drost, Robert S. Wegeng, Joseph M. Perez, Xiangdong Feng, Jun Liu
  • Active microchannel fluid processing unit and method of making
    Patent number: 6490812
    Abstract: The present invention is an active microchannel fluid processing unit and method of making, both relying on having (a) at least one inner thin sheet; (b) at least one outer thin sheet; (c) defining at least one first sub-assembly for performing at least one first unit operation by stacking a first of the at least one inner thin sheet in alternating contact with a first of the at least one outer thin sheet into a first stack and placing an end block on the at least one inner thin sheet, the at least one first sub-assembly having at least a first inlet and a first outlet; and (d) defining at least one second sub-assembly for performing at least one second unit operation either as a second flow path within the first stack or by stacking a second of the at least one inner thin sheet in alternating contact with second of the at least one outer thin sheet as a second stack, the at least one second sub-assembly having at least a second inlet and a second outlet.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: December 10, 2002
    Assignee: Battelle Memorial Institute
    Inventors: Wendy D. Bennett, Peter M. Martin, Dean W. Matson, Gary L. Roberts, Donald C. Stewart, Annalee Y. Tonkovich, Jennifer L. Zilka, Stephen C. Schmitt, Timothy M. Werner
  • Microchannel laminated mass exchanger and method of making
    Publication number: 20020059869
    Abstract: The present invention is a microchannel mass exchanger having a first plurality of inner thin sheets and a second plurality of outer thin sheets. The inner thin sheets each have a solid margin around a circumference, the solid margin defining a slot through the inner thin sheet thickness. The outer thin sheets each have at least two header holes on opposite ends and when sandwiching an inner thin sheet. The outer thin sheets further have a mass exchange medium. The assembly forms a closed flow channel assembly wherein fluid enters through one of the header holes into the slot and exits through another of the header holes after contacting the mass exchange medium.
    Type: Application
    Filed: November 13, 2001
    Publication date: May 23, 2002
    Inventors: Peter M. Martin, Wendy D. Bennett, Dean W. Matson, Donald C. Stewart, Monte K. Drost, Robert S. Wegeng, Joseph M. Perez, Xiangdong Feng, Jun Liu
  • Microchannel laminated mass exchanger and method of making
    Patent number: 6352577
    Abstract: The present invention is a microchannel mass exchanger having a first plurality of inner thin sheets and a second plurality of outer thin sheets. The inner thin sheets each have a solid margin around a circumference, the solid margin defining a slot through the inner thin sheet thickness. The outer thin sheets each have at least two header holes on opposite ends and when sandwiching an inner thin sheet. The outer thin sheets further have a mass exchange medium. The assembly forms a closed flow channel assembly wherein fluid enters through one of the header holes into the slot and exits through another of the header holes after contacting the mass exchange medium.
    Type: Grant
    Filed: May 3, 2000
    Date of Patent: March 5, 2002
    Assignee: Battelle Memorial Institute
    Inventors: Peter M. Martin, Wendy D. Bennett, Dean W. Matson, Donald C. Stewart, Monte K. Drost, Robert S. Wegeng, Joseph M. Perez, Xiangdong Feng, Jun Liu
  • Active microchannel fluid processing unit and method of making
    Patent number: 6192596
    Abstract: The present invention is an active microchannel fluid processing unit and method of making, both relying on having (a) at least one inner thin sheet; (b) at least one outer thin sheet; (c) defining at least one first sub-assembly for performing at least one first unit operation by stacking a first of the at least one inner thin sheet in alternating contact with a first of the at least one outer thin sheet into a first stack and placing an end block on the at least one inner thin sheet, the at least one first sub-assembly having at least a first inlet and a first outlet; and (d) defining at least one second sub-assembly for performing at least one second unit operation either as a second flow path within the first stack or by stacking a second of the at least one inner thin sheet in alternating contact with second of the at least one outer thin sheet as a second stack, the at least one second sub-assembly having at least a second inlet and a second outlet.
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: February 27, 2001
    Assignee: Battelle Memorial Institute
    Inventors: Wendy D. Bennett, Peter M. Martin, Dean W. Matson, Gary L. Roberts, Donald C. Stewart, Annalee Y. Tonkovich, Jennifer L. Zilka, Stephen C. Schmitt, Timothy M. Werner
  • Microchannel laminated mass exchanger and method of making
    Patent number: 6129973
    Abstract: The present invention is a microchannel mass exchanger having a first plurality of inner thin sheets and a second plurality of outer thin sheets. The inner thin sheets each have a solid margin around a circumference, the solid margin defining a slot through the inner thin sheet thickness. The outer thin sheets each have at least two header holes on opposite ends and when sandwiching an inner thin sheet. The outer thin sheets further have a mass exchange medium. The assembly forms a closed flow channel assembly wherein fluid enters through one of the header holes into the slot and exits through another of the header holes after contacting the mass exchange medium.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: October 10, 2000
    Assignee: Battelle Memorial Institute
    Inventors: Peter M. Martin, Wendy D. Bennett, Dean W. Matson, Donald C. Stewart, Monte K. Drost, Robert S. Wegeng, Joseph M. Perez, Xiangdong Feng, Jun Liu